Give it up. Skyfall was marketed extremely well, QOS seemed to have no effect on Skyfall, that tells me QOS wasn't as badly received as some perceived it to be.
It is going to gross well over 75m, your 50-60m OW prediction held no credibility. Both Craig Bond films were great, and Skyfall appears no different.
Bond just hit a new level in terms of BO, 900m WW is a likely estimate when all is said and done, amazing for a 2D film in todays BO climate.