Also, Siege may be one of the easiest maps to limit the effect of tanks by a team that knows what they are doing. Because of the buildings, Tank Sniping from near spawn is almost pointless, so tanks have to expose themselves to have an effect; there are plenty of flanking routes to get behind tanks and hit them where they are vulnerable. Due to being stuck on roads pretty much, mines are easy to place to ensure tanks have to deal with them or get destroyed by them.

Honestly, I'm more impressed by tank crews that can keep a tank up for a long time in Siege of Cairo or Iberian Offensive. Urban combat is not the ideal place for armor, without a huge amount of infantry support.

Wait...are you just trolling? Was that sarcasm?