I had a discussion about this on a UK forum about a year and a half ago. The main question was whether this technique should be taught to youngsters and I had a lot of abuse hurled my way by a load of FIGJAMers with over inflated ego's, becuase I don't think it should be, not to begin with anyway.

People are always pointing out the likes of Osku and Belmonte but these are the exception rather than the rule. Anybody that knows anything about bowling knows that trying to bowl two handed/no thumb/palming is very difficult, Yes it has its benefits mostly in the rev/power stakes but that is offset by the difficulties in control which you see with the stroker/cranker debate now.

I would still advocate teaching people (especially children) the basics and once they have a decent grasp of the fundimentals then tailor their release to suit their game/physique which would encompass all styles including that of a two hander.

The problem that may be faced is that kids already want to bowl a massive hook at all costs because it looks good and they see some of the pro's doing it. I have already seen an increase in kids wanting to bowl two handed regardless of the fact they can't hit a barn door with a banjo and frankly it makes me shake my head, especially when you have the likes of Walter Ray & Norm Duke who have shown that it pays more to be accurate rather than "Powerful".
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I would have got away with it if it was not for those pesky kids (Behind my lane) and those blasted 10 pins.

kid in my town averages about 225 traditionally.  Decided he wanted to bowl two handed and mid season simply started. He is a talent young man and is averaging about 210 for the past 3 weeks.

He never has taken spare shooting seriously anyway. All I see is more volitility... 260's then 160's using two hands. His carry is ASTRONIMCAL on off hits and lots of 9's on otherwise solid shots. His rev rate is over 500 now (with one hand was ~450) and his ball speed is over 20 (and was ~18.5).

So all I can say is that, he can open up the backends more than the rest of us (especially on fresh backends) and it is exciting to watch some of those strikes. If he would ever decide he would be the best spare shooter instead of a prolific striker with either method he would be awesome. As it is he is a typcial THS bowler maximizing what the house gives you without building skill.

As for my opinion on the validity of two handed bowling, I believe that as long as bowling has the emphasis on power (on strike balls) over skill, the more you can achieve no matter how you do it the more success () you will have. So it is a valid method.  It is my belief and bowling will require more skill (accuracy and repeatability) and as such traditional bowling (one handed) will provide the best solution.

As well, arguably, a solid foundation (bowling style the likes of Ozio ...etc) would produce a bowler that can with stand the long haul (throughout the years as the emphasis of skills change).
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Bowling Tips and Articles at: www.bowlingknowledge.com

Reality is that this is the latest evolution of the sport.  Its legal and, in the right hands, lethal.

I am more of a stroker, having been bowling over 30 years.  The equipment available today allows me to stay competitive, but this latest evolution will take off and become every popular.  No point worrying about it, its here to stay.
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www.900global.com

If life is like a box of chocolates, what do you do if you don't like chocolate?

No matter what technique a bowler wants to use, they should be accurate on their shot making, be able to adapt to multiple lane conditions and bowling center environments, be able to make their spares and not just be a "strike machine", be able to repeat shots, and implement a technique that will not inflict serious damage to the bowler's body.  

I'm to the belief now that there is no one right way to bowl.
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Ken - aka "dpunky" - Certified USBC Level I Coach