Re: Is it easier to play fast runs on a flat radius?
In general, I think the answer is "yes". Certainly is for me. I prefer a flatter radius or a compound radius like on the Jackson necks.
Profile is very important as is fret size and (duh) action.
I tend to set my guitars up with as little relief as possible...flatter the better. and I like Jumbo frets.
As much as I loved the tone and mojo of my strat, it def was not much fun to play on a day to day basis for me. Medium type frets, and 9.5" radius didn't work for me.
That said, my Gibson and Jackson play much easier for me than the super flat radius that is on the Wolfgang I just sold. Frets are not jumbo, so that could be the culprit. (?) But most likely my issue there is with the Floyd. I love trrems, but I just cannot get comfy on a trem of any type (or a flat hardtail) and my playing suffers...I NEED a tune-o-matic.
:end rambling: