Well, its not the cleanest game ever. Still a lot of derankers, noobs and quitters. Some playlists have no or very little derankers. Its still really fun. I know I love getting new armor and unlocking achievments. There are MANY new gametypes on Custom Games. I can sometimes get 6 friends on Custom Games and if I'm lucky almost a full party. There's about a decent 25,000 online a day. A little less than a small town, on the east coast. Not like Reach, but I love to play it. Road to Recon takes a while, but its possible. Some people who have 50 arent really that good.
They may have had an older sibling get the 50 high for them. I know a few people who have Recon that have had their older brothers do it, so maybe it happened to them also. But, I guess its a little hard. Some poeple derank on 50 high so they can restart, but only about 1/5 of them do.
[Edited on 08.31.2011 2:09 PM PDT]