David -- Only a small part of table editing behavior (e.g.,
auto-aligning of column dividers, adding new row beneath current row)
is done entirely in Vim. Most of the stuff is done by making a call
out to Emacs server, which makes all the functionality of Org-mode
available in VimOrganizer. You can read about spreadsheet specific
functionality here:
http://orgmode.org/manual/The-spreadsheet.html#The-spreadsheet
Sadly, it doesn't make sense to replicate in Vim what's already done
in Emacs. On the other hand, if you've got your Emacs server set up
then you're good to go. Only issue with spreadsheet evaluation is if
there's an error when evaluating (e.g., you wrote a formula wrong or
with a typo). If it's not obvious to you what's wrong you need to
open restore the Emacs window and look at what hung it up there.
-- Herb