Question for ladies that do tickle sessions (receiving)

Ive been doing this for a while now as a tickler and had some amazing sessions but Ive also had my fair share of providers that were absolutely not sensitive at all but were still a blast to hang out with.
I understand the theory that a lot of providers just arent ticklish due to the nature of the job and the need to mentally be in charge and not lose control.
We talk about IOP here a lot, so in your opinion how many of the great ones were acting? Not that its a deal breaker because i appreciate a good fetish performer. I just wanted to start a discussion for those of you that have entertained this niche kink and find out everyone elses thoughts.