I can flick my tongue faster than *whatever motor moves really fast I don't know anything about motors*. There are a decent amount of SPs who don't respond well to the 1000 MPH DATY approach, but the ones who do LOVE IT. I thrive on their feedback, however it may come.
I don't have a lot of direct quotes (just a lot of loud, incoherent outbursts), except from my favourite/regular SP. On my second visit with her, afterward she said "It usually takes me way longer to get off, but you make me cum so fast" and during our last visit a few weeks ago after I was done she curled up in a ball and said something like "Holy shit, I wasn't expecting that" (she'd been out of the biz for a couple of years and had forgotten).
My other favourite thing is cock worship. I dunno why; I'm well endowed but I know size doesn't really matter. But once a mature SP got her hands on mine and, after the usual exclamations I love to hear about my size, she said "I've paid good money for dildos this size" and that's always stuck with me because maybe size does matter sometimes? Who knows.