Please post new questions in a new thread in future.

If you look while the query is running, there will be at least one thread that doesn't have a cxpacket, that has a different wait type. Whatever that is is what's holding the query up. What is it?

I usually recommend generic performance tuning (tune the query, tune the indexes) before panicking over CXPackets. It's quit common to see them on non-optimised queries.