Bitcoin XT nodes are outnumbered 45 to 1 by bitocoin core nodes. That's just one or two weeks before Gavin submits the block size increase update. Meanwhile bitcoin core nodes have even increased after Mike's statement on June 8th from ~5900 to ~6040 today.
Oh wait, I just realized that the submission of the block size increase update does ABSOLUTELY NOTHING to the block size. This change will start tracking "votes" for the change in mined blocks. That's it.