Hey, I'm still happy about my purchase but when I bought it I looked at the specs and thought: Hmm, they've disabled 3/16ths of the shaders, but it has the same ROPs, same cache, same RAM... if I buy two for SLI it should perform like the GTX 980 except for having 2x13 = 26 shader blocks instead of 16/32 for a single/double 980. Now I find out that's just not true, it has 0.5 GB quasi-RAM it can't access at the listed memory bandwidth, I feel I got very legitimate reason to feel cheated.
Apparently the ROP/cache isn't a big deal at it makes sense to use 7/8th = 14/16th to serve 13/16th the shaders, if only they'd listed the specs right. But gaming at 3840x2160 with SLI there's a fair chance I could run into a game now or in the future that wants to use all 4GB where it'll either act like a 3.5GB card or drop the framerate significantly underperforming compared to the GTX 980, I don't think that's just theoretical.
I'd probably still be quite cool with a 3.5GB card with 0.5GB of "last resort" memory that's still faster/lower latency than system memory. But they were in error and have admitted they were in error, I think that goes a little beyond "We said we're sorry" Paying some kind of compensation for falsely promised functionality would not be unreasonable (or swapping my GTX 970s with a 8-channel memory version, but I guess that's overkill). I'd be very surprised if there isn't a class action lawsuit very soon.