Outperforms how? In reach ? No! In IQ? Only when not being FL limited. In BIF? I would certainly laugh!If we see Quad Pixel (or any other new AF tech) it will come in the R1 long before it shows up in a prosumer body. If there is an R7, it will likely be the same as in the R5/R6, which really isn't a bad thing. I'd rather have that than what any DSLR could offer as it outperforms any DSLR I've ever used (including 1DX II). My friend went from a D500 to a Z6 II and as bad as the AF is in the Z6 II, he still says it outperforms his D500. I know he gets better results.
In my opinion, my D500 and D850 with 500mm PF cannot be outperformed easily - in birding photography - since they produce excellent results! I just don't make much use of a TC.
Regarding Quad pixel there is a chance that Canon might test it in a non-top model first.