Sorry for taking so long to get back to you: What I believe is that there are currently no keyboard layouts worth the hassle of switching, and to be honest I have a bit of a problem believing that there's any particular layout of 12 inch by 3 inch bit of space covered in linearly activated keys that is going to ever change that fact.
Most changes in keyboard layouts are obviated by the fact that peoples fingers are more flexible than the language they type in.
Do I believe there's better possible input methods than a 104-key keyboard? Most certainly. Have we got any yet? I don't think so.
Thanks for the response. For most people I'd agree with you. I found my RSI symptoms were significantly improved by switching to Dvorak though. I concede that is not a scientific test :)
If nobody can, then one just has to conclude they are indistinguishable.