Quad-Core Intels (Kentsfield) in Q1 2007?

Digitimes claims that Intel will be introducing their first Quad-core CPUs in the first quarter of 2007.

The Quad core chip is codenamed "Kentsfield". They also report that Intel's dual-core Conroe chip which is speculated to make its way into Apple PowerMacs (Mac Pros?) this fall will be introduced in September of this year.