Chalk it up to the inconsistency of chips on various PCM codes. Some people love em, some people seem to feel no gains.
It shouldn't be a contact issue, or else (like Dan said) it would stutter, stall, or not start up at all.
Just to make sure if you want, you might consider spending the $40-50 to get a before/after dyno test and see if there are gains (that might be unnoticeable) or you might find out it didn't do anything.
