Going for diamond weapons ranks you very quickly too because of all the headshots challenges.
I hit max prestige in this game way earlier than any of the other Call of Dutys. I think somewhere around 6-7 Days played. --- [LanParty nF4 Ultra-D] [AMD64 3700+ San Diego] [2x 1gb Corsair XMS 3-3-3-8] [2x 250gb Barracuda] [Soundblaster Audigy 2 ZS] [X850XTPE]
Between getting diamond snipers, AR's, and SMG's, and all the double XP, Master Prestige took about a month. It really isn't hard. --- GT: Irish H2 "Oh, my bad, I was high on gamefaqs again" - Oblivion
No. The entire first week of the game was 2x xp. I was already 6th prestige after the first week, it's pretty easy to prestige in this COD if you rotate between weapons/equipment/scorestreaks.
I agree, completing weapon challenges makes a huge difference to ranking up fast. Hammer the 2x XP weekends and PTFO and youre set. I found the best gametypes for xp were kill confirmed and hardpoint. Also dont get confused between SPM and XP. XP is only viewable in the after action report.