I've only ridden about a couple of dozen laps on a track on non-race tyres...I can't comprehend a Gen1 R1 on road tyres...in the wet.
To be frank, 1000s in any form kinda terrify me. The vast bulk of my track time has been on 125GP and a couple of practice weekends playing on a TZ250. The size, power, (relatively) poor braking and turn in, make my riding style umm, "unsuitable".
A mate's GSXR750 was an utter handful for me due to having to recalibrate my braking points etc. Big buzz, but not satisfying (and I have to learn how to ride better...)
Helmet fogging sucks. PI in the wet is eye-opening. Tucking into the bubble down the straight tends to fog you up pretty nicely....just in time for Turn 1.
Worst thing about wet riding? Climbing back into soggy, cold leathers...worse than getting into a cold, soggy wetsuit and somewhat less appropriate to piss in.