I don't think Gen12 HPG is the reason because in the end it's all Xe based, there are surely small architecturally differences in Gen12 HPG but the main driver base should be the same, also Gen12 HPG won't be ready before Q4, delaying TGL/RKL drivers doesn't make sense to me. We can only speculate but I could believe they are not happy with the driver base and need more time for a bigger restructuring of some driver parts. The last official driver is dated 18th February.Driver team is most likely mobilized to help with dGPU drivers, no resources to spare on side show that is iGPU atm probably. Good thing is that it is same architecture, so game fixes/optimizations will trickle back to iGPU drivers.
How it comes there are Iris Xe gameplay videos from Batman Arkham Knight on youtube? And how does it prove your 30% claim? You were claiming UHD 750 runs only 30% faster than UHD 630 despite almost all benchmarks from several reviewer shows 50% or slightly more? Feel freel to prove it with some more benchmarks, I may not found all UHD 750 reviews. Considering that the gap will most likely grow over time (the old 9316 already seems to improve certain scenearios over the even older press driver) 50% feels about right.OK so this was my experience running Batman Arkham Knight - it would not detect the Intel drivers at all, and the game runs using Microsoft's Basic Display Driver. I contacted Intel support and this was their response:
You happy now?
edit: another test with an average of 50%+ higher fps: