I don't think they are going to have a 40 vs 40 matchmaking. Lag would be of the charts...
What caught my attention the most was:
"So what exactly did we play? Something you would expect, something you should expect, and something so new it came with instructions. And yes, David Allen, I did make sure to pop into the [redacted] to check out the new [redacted]. And why yes, it was sweet."
So it ws something completely new! I seriously can't wait to see what Bungie is making!
[Edited on 10.30.2009 4:30 PM PDT]