As a BTM subscriber, I couldn't help but notice that recently, the brands under the Brunswick umbrella have only been providing the HP balls for review to BTM.  I received confirmation of this when I sent a message asking if/when there will be reviews posted for the mid and lower tier balls.

Specifically these are:
Brunswick Brute Strength, Soul and Soul Mate
DV8 Vandal and Holligan Taunt
Radical Primo, Rave, and both Rack Attacks

Now I know there are review balls being provided to other entities and publications (e.g., Bowlers Journal and Lane Side Reviews).

Perhaps I'm in the minority, but I put a lot of stock into the rating system I find in BTM;.  I find it invaluable in quickly identifying equipment that may fill a hole.  I can make a short list based on ratings and whittle it down from there.  These Brunswick family balls will not be making those lists. 

I'm sure they have their reason for short shrifting BTM; maybe they have internal numbers indicating not a lot of return from BTM subscribers?  I have no affiliation with BTM other than being a paid subscriber.

I have been a big Radical fan (I've bought at least 9 of their balls and I only started bowling less than three years ago).  I can't say they have all been winners for me, but I generally like their stuff.  But I can't say that I will give serious consideration if I can't screen their ratings with BTM.

I understand what you are saying.  However, as Snakster stated above, his son chose a ball strictly based on a hook potential number in a magazine.  Perhaps the Guru Master is the hookingest ball on the market.  But does that make it the best?  Now, every ball company who produces a hook monster ball has to compare its overall hook number from a magazine to the Guru Master whether fair or not.  If the numbers don't compare, then it is viewed as inferior. 

"Don't have the highest hook rating, then I don't want it!!!"

What you're describing is a fundamental failing of the bowler. All the magazines can do is provide a realistic assessment of a given ball's capability, and the conditions under which the ball performs best. Unfortunately, the "I want the ball with the highest hook rating" is a phase that most bowlers have to go through. I certainly did, and I wish I had learned the fallacy of chasing hook earlier. Most of those who successfully progress up the bowling food chain grow out of it.

The Brunswick Nirvana has been reviewed on BTM.