Very interesting. Also good to get some idea of where Panda comes from, so to speak, rather than just being a faceless "insider". I understands the whole concept->development thing though, I think one of the main reasons we haven't heard anymore on the Merge is that its been in the planning phase so long that it would need a hardware upgrade to dual-core or LTE to be relevant at this point. While it would appeal to some, I just don't see it being a big seller for very long. We already have a Desire with LTE, so one without LTE but with a keyboard would only appeal to a certain set of customers unless it offered more substantial hardware.
Anyway, if you read between the lines of this and his older posts, he still seems to suggest that some dual-core LTE device is definitely coming in Q2. Maybe the GS2 LTE is real after-all.