We know that there are no fewer than four other actively supported gaming platforms today with no download size limits and that there are zero games on these services that arbitrarily bulk up to some size that's a meaningful inconvenience to customers for no reason.
How about 588 MB Chrono Trigger for iPhone?
Edit:
also for a concrete example of developers shoving crap down customers HDDs: the PS3 version of Bionic Commando Rearmed had a 100MB trailer of Bionic Commando 2009 included, while on XBLA, which still had size limits, it just let you download it seperately.