Sn,
Erin is right; it COULD BE a coaching issue. I can't say for certain.
Also shelley's summary is good. One important factor is, again, everything, ball, surface and release adjustments are all relative to the ball or the bowler. The combination has to be right.
You said:
"So the net result is that the ball would "go longer" and "snap harder"? It is what most bowlers want."
It does not necessarily make the ball more snappy. It DOES make the ball retain energy longer. The ball, with low ball speed, may be "burning up" early. Modifying the surface may not even bring into "snap" territory.
Originally, I was only suggesting this because your profile said you had low ball speed.
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"None are so blind as those who will not see."