brushless questions to prove a point

[team3six]

I am having an arguement with a friend of mine and want to prove my point. So as to not suggest what I think and just get your answers, I am onlt allowed to ask the question and get your answers.

1. What KV is a faster motor. a 3500kv or an 8000kv motor?
2. When an esc is rated for 6S, does this mean two 3 cell batteries, or does it mean two 6 cell batteries?
3. Can you run 2 brushless motors on the same spur gear and gain twice the speed, or is there a slight gain with 2 brushless motors?
4. Are there faster and better RC Brushless electronics than Novak, and LRP?
5. Can Lipo batteries explode with out proper balancing?

Thanks, Hopefully your answers will be the same as mine to prove a point.

Ohh and are any of them ESC motor combo's on ebay for the heli's fine to run in an RC18T. This one I dont know and would like to get some opinions on if so and which one? Laters.