Bwahaha, that's as fake as they come. :p
The price points are whatever. There's System Shock 2 mixed in with 5 other releases the same day, etc.
I'm going to go with no. Not going to happen.
The idea was to be coinciding with E3's conference days.
It makes sense considering EA owns the license to System Shock and yet the most wanted games on GOG have never popped up in the library. I think they were holding out for a special moment.
Still, not holding my breath, but still watching and waiting.
EDIT: From looking around, the price points from suspicious ones like Sonic Adventure DX are to compete with other D2D services like Steam with a similar price.
About the only ones of suspicion for this list are the Dooms, the prices seem lower than most sites offering.