This information is useful, but only to a point. My sense is that the partnering process has a winner-take-all dynamic. On one hand, of the 6000 partnerships that were initiated, many likely fell by the wayside because the drugs in question didn't survive closer scrutiny; on the other hand, of the 600 that reached non-disclosure threshold, there were likely multiple offers, so the 1% consumation rate shouldn't be interpreted as implying that the other 540 companies who entered into non-disclosure with Merck never partnered. At least some of them found better offers elsewhere.
The more relevant number is the percentage of companies that progressed to non-disclosure that went on to partner with anybody. If we are to take Varney at his word, that is the number that we need to know about to estimate cor's chances.
All this said, the "build it and they will come" assumption that I and everybody else vested in cor has made looks pretty shaky.