Yep, that's the right size. guess the pics just made it look off

Marines vs. Titans is always a tough battle for marines. It's a bit hard to see in the shots up there but it looks like he really bunched up his units which makes the quake MW template devastating. I think I'd have spread out more to keep as few units under the templates.
I think the earliest I'd have seen assaulting the Reaver was the start of t2. Give you a turn to strip shields and put BM on it and get your speeders into position for supporting fire. Then teleport the Termies in t2, and assault with a thawk or the termies and then try to retain and kill the reaver with whatever hadn't assaulted yet. It's a tough fight either way but it should be enough to pop the reaver.
The other option would be to try killing off all your small stuff and ignore the reavers. I think he had enough to wipe out most of the other formations, but he would have had to be pretty committed to whittle you down as quickly as possible.
How did you feel about the 6 shot GB?