Yes the ISs I test drove were cramped, for the wrong reasons too. I don't mind being a little tight. Aside from the driving dynamics, it also looked a chick car to me, again just a personal taste issue.
The E90 is the right size for me, which is why the F30 may be unnecessarily large. For the F30's styling to work I might need the m sport package, which will be a big premium added.