And what if you want to have it all?  
How's the win ratio between the two for example, I also hear the queues are very long on Horde whilst on Alliance they are a lot faster. 
It would be a shame if I spent X amount of days leveling to 60 and then X amount of days/weeks gearing only to find out whatever faction I chose lost 3/4 bgs when pugging, and/or the same scenario when doing premades. 
  
Could you go into detail on the subject alittle more please? 
Thanks