Very low supply of 28nm, hence
"AMD most definitely wont have enough cards to satisfy demand", plus since AMD would launch high-end SI to replace 69xx, it
"would kill 69xx sales", and those are the only premium GPU's AMD could actually meet demand of usually the most profitable Q4.
Bottom line, launching premium SI cards this year would be like killing goose who lays golden eggs (69xx)
Makes no sense whatsoever. If NV would launch Kepler in Q4, then its understandable soft (or paper) launch in a speed-race, but AMD wont face Kepler till sometime 2012, therefore no rush.
Psycho thinks AMD could launch SI with +50% price, I would doubt that as well, unless AMD pulls NV and starts selling cards for 1k.