for me it's somewhat the opposite:
I can work with Windows 7 most of the time but during heavy copying - and especially during antivirus scanning (set to high priority), indexing of files with copernic desktop, google desktop, etc. you simply can't work with it - the delays take MINUTES
- this really shouldn't affect productivity
compare that to my Gentoo system with 2.6.34 or 2.6.35:
even during heaviest transfers, compiling, etc. it's still responsible and I'm NOT using BFS or BFQ - only stock CFS and CFQ - it's not even locking up when doing a desktop search indexing, copying my roughly 800 GB /home partition to another disk (both encrypted), hearing webradio, surfing, etc. etc.
- the only problem also taking MINUTES to react is when it's swapping out memory but that's a problem due to heavy swapping when I use all of my memory (not the typical case)