photobucket rips all that info when you upload your picture. All someone needs to do is go view your account and they'll see the stats, what camera you used, lens, settings, all that stuff.
If you're looking at the original file, just right click from explorer and click on "properties" and it'll list it there as well.
and yeah, grainy = noisy.
edit:: and you're getting better so fast, just look at the difference from the 1D pictures you posted the other day! wow!