Very well done summary, Gerk!
The following picture from the FAQ (http://www.trulyergonomic.com/faq.html#Interchangeable_keycaps) shows it quite nicely, though I haven't actually pulled the key caps on mine to verify.
Show Image
(http://www.trulyergonomic.com/images/TrulyErgonomic_com-Keycaps.jpg)
Yes but that doesn't compare their keycap profiles to standard cherry ones. Some are the same (or close enough), some may not be -- but hard to say without doing a direct comparison. Some are definitely non-standard (like all the center column) -- that one is the easiest to figure out :)
EDIT: That also doesn't show the differences in all the rows. This layout is no longer the standard 4 row kinda setup. There are various levels going on.
What I've noticed so far:
- esc/F key row seems to be standard cherry sizing.
- The row under that (with the 3 keys only, Fn key, etc) seems to be the same profile as the qwerty/Delete-End-Page Down row on a standard board.
- The row with the numbers seems to be the same profile as cherry standard. Not sure if it's an optical illusion or not, but there does look to be some sizing difference ... if there is it might be only with the actual top of the keycap itself and not the whole skirt diameter. Will have to investigate further for this, but no time for the next couple of days.
Not really sure about any of the other key profiles as of yet, pulled a few to look at things but haven't tried to swap anything out or compare them to standard keycaps. The one thing I did try was to put standard cherry caps on some of the longer keys and center cluster keys ... and that didn't work out for various reasons depending on the location.