Originally Posted by
Abneycat
I'm just making a presumption here: a possible reason for the slow dissipation of Downtube's bikes is that the 2010 bikes are coming, but Dr. Yan is letting stock dry up on the older models before introducing the new ones. This is a pretty common practice, and the recent sale could be to help clear out the old stock before releasing the new selection. Just a theory.
He's pretty much said as much on his forums. That the availability of the 2010 models is largely based on the sale of the 2009.5 models. Though I think April was mentioned as a likely switch over point.