I don't think you run into problems till you get to 9.5 with wide tires. I could turn full lock with 18x9.5 +37 and 245/35/18. With 255's now I can still turn full lock, but it does rub the inside metal a little bit.
Interpreting your question another way, however... no, it's not possible to fit in "compact" spots anymore.
I think it feels more planted and more controlled...I went from the stock 16X6.5 to 17x7.5...granted some of the improvement is the tires since I went from the awful stock Bridgestone EL400s on the 16 to Conti DWS on the 17...love these tires...especially here in Vancouver.
More controlled/planted for sure and expect to see an improvement when I ditch the stock EL400s for a wider, summer specific tire. Right now the stock 205/55s are mounted on 2004 RX-8 wheels (16x7.5) and going to replace them with 225/50s.