Well looking at bit more into this "idea" I have decided it is bad for a few reasons now. First and foremost the drivers for windows just don't support enough features, they cant defrag a ext3 partition. Next that is equally important is it gets mounted as a ext2 partition so journalizing is out the window(or is it windows?). Last but not least how am I going to fsck it unless I go into Linux regularly on this computer.
I guess I should have looked further into this before posting about it, I got all excited when I saw the increase from 4k reads and jumped the gun with ideas of what I am going to do.