there has never been any strong link between him and Dave.
I want to say it was Corey Holcomb that said it best "Comedians know comedians" he said it kinda like when you watch a random fight and mayweather or shane mosley or someone is in the crowd watching, fighters know fighters, comedians know comedians, they know who is getting pushed, signed, good deals, pilot talks, whos stealin jokes. Its not just hearsay as some comedians are good friends outside of the business and just like high school your going to have 2 people who dont fukk with each other at all but then one dude who fukks with one and fukks with the other. Granted these dudes may have never been on screen together, we dont know if through any gigs katt opened up for dave or what in the past but they know each other. but you are right in that until dave comes out and gives his full side, no pc filtered story everything else is speculation, but even if we are ever to get that it'll still be the same with people saying "he was paid to say this" or some other shyt