So let's say COD:AW sold 750k

PS4: 262.5k
XB1: 240k
360: 157.5k
PS3: 82.5k

Why is that surprising? Destiny (the year's other high-profile shooter release) had a ratio between PS4/Xbone that was not big (46% for PS4 and 36% for Xbone), even though PS4 had exclusive marketing and bundles... this time, all that is in favor of the Xbone with COD. I, myself, was expecting the Xbone version to come out on top in its first week.

This is very impressive for both platforms though, compared to how last generation consoles fared.

AC Rogue still on the way. In any case, you wouldn't say it was bigger than GTA if it had sold something like 35m vs 31 from GTA. 

PS4 259k

XB1 237k

360 155k

PS3 81k

If we trust VGChartz numbers for Destiny, TF and Wolfenstein

The way games are selling on PS3 lately Rogue would be lucky to hit 2 million let alone 4. 

And to your 2nd sentence: It hasn't though

PS4 version on the top, that is quite surprising.

1%pc

x360 userbase 9m
ps3 userbase 5.5m

ps4:xb1 sales ratio maybe still ~ 1.5:1

so still a higher attachrate on xbox than playstion

Destiny continue to impress with hight sales.

And CoD selling more on PS4 when you have a Xbone Bundle surprises me... amazing.

Not sure about the surprise in ratios. Xbox will almost always have higher attach rates for shooters than PS because the fanbases are not the same. That's why MS pay for more shooters like Sunset Overdrive, Tomb raider and Quantum Break, even though they already have Halo and Gears. It is what the X1 fanbase wants, and they will buy it in greater numbers than Playstation owners, just like JRPGs and racers will almost always have higher attach rates on Playstation.

What's the big deal? Nothing that is happening right now with these ratios is new or out of the ordinary

Destiny sales on PS4 triple those on X1!!! Oh my that is beasting.