if those are the actual caps, then they are FAR more generous than what the warning letter was crying at me for. originally it told me the average usage for someone on 10 megs was around 45 gigs / month (can't find the letter, must have deleted it).
i watch a lot of netflix in hd streaming and i usually stream about 1 season of tv shows a week and average about 100 gigs. i'm not thrilled to see caps AT all, but vs the original "soft cap" the letters warned of, this is a lot better.
though i also think that for a 100 meg account, anything below 500gigs is ridiculous. you're paying out the butt to begin with, if it were me i would def. want room to use it.