EXACTLY the same situation here.
And here. Nate is nearly 8months and wakes every 1 1/2-2 hours. I've tried the Pantley techniques....maybe I'm doing it wrong but hers didn't make an iota of difference. He is as restless as all gettup until 9.30-10.oopm...only in the last few nights will he actually spend some time in his cot.
This is my second crack at a crappy sleeper. He's waaaay worse than Darcy was. So in my most frustrated times I go in and sit with my sleeping daughter who now at 3 1/2 happily does 12hours over night....gives me hope.

Sorry but the point of that whole ramble (maybe I'm more frsutrated than I thought) was that your bub sounds completely normal to me. Hang in there hun This gig ain't easy is it?