Seems that Intel is going to start shipping the Quads next week if this story holds true.
As you know, the shipments of 45nm quad-core Core 2 Quad processors were delayed due to issues with processor system bus discovered in them. These Yorkfield processors on the new C1 stepping that would be free from this problem were expected to arrive in early March. According to sources, the new processor went into mass production exactly as planned and next week we should see 45nm Core 2 Quad Q9300, Q9450 and Q9550 in retail stores already. The mass production processors will be based solely on C1 stepping, which doesn’t have any changes to its thermal, electrical or mechanical specifications compared with the previous C0 processor stepping that is used widely in dual-core Wolfdale processors these days.
Quad-core Core 2 Quad Q9550 and Core 2 Quad Q9450 processors will be designed to work at 2.83GHz and 2.66GHz respectively. For the first time for Core 2 Quad family they will work with 1333MHz bus and thanks to 45nm process they will feature total 12MB of L2 cache memory. Core 2 Quad Q9300 works at 2.5GHz frequency and also supports 1333MHz bus, however its L2 cache is only 6MB big. All new quad-core processors feature 95W TDP. The official prices of Q9550, Q9450 and Q9300 models are set at $530, $316 and $266 respectively. Nevertheless, they will be priced a bit higher in stores, because of high customer demand, which Intel cannot satisfy so far.