My slowest was about 256kb on the day they released Portal for free. I have a 60mb service.
the slowest i've seen a download on steam in the last 3 -5 years is 1.1mbps for me2
Redeem code is in multiple places. If the developer puts it in the game, it's in a game menu. However, you can consistently find it by: Guide Button > Markeplace > Redeem Code. As for your wireless issue, you really should be running wired. It's faster, more stable and more secure. But if you insist on wireless, then you should maybe look at your settings to see why you are only at G. The Xbox 360 S (and the Wifi adapter for the old Xbox 360) are both at N.
how am i supposed to download a download only game i only have a code for and no disc from anywhere other than teh redeem code option in xbox dashboard which is so cleverly hidden away? code did not work in xbox.com. i started the download before i started drinking that night and it finished near the end of the night. maybe it had more to do with the xbox s having wireless g and not wireless n.