In reply to Taran.

Correct, that's the normal course of things for all the server vendors (not just UCS.) Intel will qualify a new architecture for notebooks/desktops several quarters earlier than for servers. the glue for SMP designs takes longer to develop; some server vendors will build ~64 proc systems around it.
Check out the server reference in this article on Haswell:
http://en.wikipedia.org/wiki/Haswell_(microarchitecture)