Please keep in mind that GILD made their multi billion dollar move on Pharmassett with only Phase II data. So I don't think they wait on "final convincing data" from Sunrise as then everyone would be privy to the information.
Pharmasett was larger than pphm and didn't have the poor track record of pphm; botched trial, failed trials, etc. Nor did they have the ridiculous anti-shareholder bod. So it will likely require solid indisputable data to convince anyone to risk capital and reputation with pphm.