I presume you mean 100 MB (or just plain 100 MBytes) - so, 53 megabits/second. So a little better, but nowhere near 1 gigabit (which I presume you have, it's so cheap here - not that it seems to be useful for anything other than great speedtest results)
I use homeplugs because the router and computer are in different rooms. So I only get about ~300mbit from my room. I've never actually tried from next to the router.
My point was just that I get better results using CloudFront than using S3 or Multi Upload S3.
