Some of the guys on Brian Enos site have complained about Titegroup heating up the gun more than they see with other powders. I played with it in my .40 days and ended up liking WST better.
Myself, as well as a couple guys I shoot USPSA with, really like WSF. 5.0 grains with a 124HP Precision Delta gets me 135 out of my P30 on a 75 degree day. I have found that the faster burning powders like Clays and Titegroup shoot softer but magnify any kind of limp wristing issues when shooting offhand, etc. Vihtavuori N320 is really nice if you want a balance between soft and reliable.