The first link here says 3500 albums, I think that's the 30000 tracks to be made available on Tidal.
http://www.realhd-audio.com/?p=5864
http://www.stereophile.com/content/mqa-and-warner-real-scoop#HXscIIUAzhbcoIGD.97
Thank you Wklie, interesting. So they now have 500 albums on Tidal with 7X that to come probably over the next X? period of time. I wish Tidal had a magic MQA wand that they could just wipe over their entire collection....for me that would be game over. Thx again, I was looking for this type of information.