He's right. I'm looking forward to Portal 2; however, the continuation of the Half-Life series will eclipse everything Valve does for that year (in terms of expectation and anticipation) for me personally. But perhaps that's why it isn't out yet.
Until then, keep fighting the good fight, Mr. Lucas Molyneux. Oh, and ask your dad to re-tool B.C. and release it on the Xbox 360. That original Xbox cancellation still stings.