IDC, that was a very good post, and something I didn't consider. It could just be a short term problem as potential customers get more comfortable with GF's long term viability. At the same time, there must be some other causes of trepidation if TSMC really has at least NINE TIMES as many customers lined up for the 28nm process. From what I have seen, both are planning on production in this node around the same time. (Although I think TSMC is going gatelast HKMG versus gatefirst HKMG for GF, which would make TSMC more desireable for performance in non-SOI production.)
Similar happened with IBM when they threw their hat into the foundry market as well. Everyone sat on the fence waiting to see if avoiding IBM was less risky than going with them.
The few fabless guys that went with IBM (Cyrix, Xilinx, ATI) quickly and publicly regretted/lamented the decision. They lost revenue, elevated risk, and suffered for it.
GloFo may well have the world's best 28nm process to grace the planet, but being fabless isn't about being super-dependent on your foundry, it is the opposite. You have already decided your business model is about differentiating your products at the design/feature level and not at the process-tech level.
Foundries compete with each other on the basis of production cost and timeline to volume capacity for your product. It is not really about being 10% faster in the xtor dept or having 0.2 lower k-value in the BEOL dielectric.
The vast majority of fabless companies are not interested in relying on the foundry to provide the market differentiation of their product at the consumer level. Companies that do tend to be companies that keep their fabs so they have control over this for all the right reasons.
That is what outsourcing is all about, lowering cost and risk. If you don't manage your foundry then you haven't lowered risk and that is just as bad as not managing the cost.