I actually like the split keys also! I don't think it's small at all. It's just needs time for me to adjust where the letters are and using my eyes to see that I have pressed the right buttons!!
Yarrenbool said:YES!
The split keyboard was one of the new features of iOS 5 I was most looking forward to but due to its size find I don't use it as much as I was expecting to.
I also find it a lot easier to use in portrait mode than landscape, the opposite to what I was expecting.