1. I have seen a slight performance increase but that is probably my head spinning lol. But the main problem with the Elites is that they are big targets.

2. The muber next to your rank is basically how good you are in that game type. It can be how good you are or how much you have played. That number also determines what ranks you will receive. For example: Youy need a highest skill of 20 to become one rank while you need a highest skill of 30 to be another rank. Also you obivously need the required amont of Exp.

3. You gain Exp by winning games you have played. Losing games will not lower you Exp, but it can lower your "highest skill" number. Also if you ever quit a match while the match is still being played, you will lose 1 Exp.

4. Campaign meta game is the same exact thing as the regular campaign. The word meta refers to when you turn on scoring for the missions you go into. Basically it turns the campaign into a sort of arcade mode with you getting points by killing enemies and destroying vehicles and stuff.

Also the answer to your last question is this:

The reason as to why the number is different is because you have a different skill for each game type. This means while you may be really good at Team Slayer with a highest sill of 45, you might need a little work in a Ranked Big Team with a skill of 15 or something. This just shows your different skill numbers for the different game types. Also shows to other people if they should try hard against you or if they should just walk over you lol.:)

ive played CoD4 for quite a long time (around eight days total time) and i have been playing the online in Battlefield for awhile too

i really like both of them a lot and heres my little rundown:

Battlefield: i just love the vehicle combat and i think you get a lot more satisfaction from killing someone in battlefield than in CoD4. Also Battlefield offers much more war like action. Explosions look stunning. I think sprinting is a lot of fun because of how good it looks while running lol. The echoes of the guns as you fire them are fairly nice as well. I like how snipers can call in airstrikes on vehicles. This game definitely takes a lot more skill than CoD4 does. Working as a team is a lot of fun. Oh and here comes my big point: you can actually pilot the helicopters instead of just calling them in in CoD4!! lol. And also hearing the yells and screams of enemies and allies around the battlefield is my favorite part because it makes you feel that you are part of the action. ESPECIALLY IF YOU GOT SURROUND SOUND!!! lol.

CoD4: Obviously this game is a lot faster paced than Battlefield. It moves a lot better as in more intuitively. The campaign was amazing. The ending took me by surprise actually. No vehicle combat that you can actually drive. Nice animations of the guns and movements. The ten prestiges are probably the biggest part to the online. Its just going from lvl 1 to lvl 55 all over again, ten times. Challenges add a nice touch. Weapon attachments are also my favorite part to playing CoD4 online. I am a fan of silencers. There is a fairly large detriment i found while i was playing yesterday: i caught several people staying in one spot throughout the entire match, too scared to go out and fight.

So my final words are these:

Battlefield is a much better muliplayer game. All the awards and stuff make this better. You get a lot more out of multiplayer in this game than CoD4

CoD4 is a much better single player game. Once you hit lvl 55 for the first time, expect to do it again ten times more. That always got to me as boring. You get a lot more out of single player than Battlefield.