1080p is just PR,its 20fps and very jerky,if you have seen the samples,its not useful.Only 720p is usable.
and i like how it inherited the high ISO perf & NR algorithms from 5d.
There was an update for exFAT for xp (was posted here few days back).
ntfs is bad choice as far as those flash drives are concerned (compared to exFAT).
Make a small partition in usb drive to carry the update for exFAT perhaps.