I don't complain about them not optimizing MS software.
Open keynotes. try to scroll templates. They lag. Don't tell me they don't.
Pages glitches on imported .doc files.
Yes, they lag. And I have written at least two posts about it in this very thread:
...for some reason there seems to be a performance problem with some image views in the HiDPI mode
Again: there seems to be something wrong with Apple's image framework which causes some views containing images to lag under certain circumstances in the retina mode. What this is - I don't know. Certainly not a hardware problem. Why Apple hasn't fixed it yet - I don't know. Anyway, the issue is isolated enough to be only a slight annoyance. There are other bugs which should clearly have higher priority.