It made my bike feel better not as twitchy on hard braking and better in the wet. That is my opinion. When cornering it is a little slower on leaning but you get use to it. It just feels like a bigger bike. But i like the way my bike feels now. And on the street if you ride normal you don't really feel the difference that much. With the wider rubber the bike looks good too.
Yes i know and your right about the racing bikes getting smaller tyres. But i am happy with the way my bike feels with the bigger tyres. And to me and the way i ride it's an improvement. Now when i had the CBR 250 i could not put a wider front tyre on that bike because of the front fender being a little smaller. So on that bike i stuck with stock size tyres. Little did i know about the fenders being different because on the 300 i was able to go bigger on the front.