I just tested. I'm 99wpm on a splitkb.com Kyria split ortho and 102wpm on the built-in keyboard of my macbook, doing a single run on each on monkeytype.com.
Switching layouts (e.g. qwerty to dvorak or colemak) takes a long time to get back to your normal speed, but ortho/columnar vs staggered in my experience is something you get used to very quickly.
But apparently there is a huge variance in how quickly folks adapt, so I may just be lucky or have enough past experience with different keyboard shapes that it happened to be easier for me.
Switching layouts (e.g. qwerty to dvorak or colemak) takes a long time to get back to your normal speed, but ortho/columnar vs staggered in my experience is something you get used to very quickly.
But apparently there is a huge variance in how quickly folks adapt, so I may just be lucky or have enough past experience with different keyboard shapes that it happened to be easier for me.