| Nuklhed, the difference you would see would really be in your hosting. Download would be more time to get large files would be decreased. If you do streaming videos stuff, you could do more of it at the same time with higher resolutions.
The upload, would mean larger rooms with less lag. Somebody seems to come on with a crappy ISP that causes some lag. The deathmatch, you're probably not going to see much, but for things like GRAW online co-op missions, you'll be able to host large rooms (and thus get a ton of FR for strangers). If your LAN setup right, you'll be able to do around 12-14 people on a GRAW co-op mission. It takes significantly more bandwidth to host online co-op mission. | 
