You didn't say: Larry's preference, you said "generally"
Larry does not explicitly address that in perlstyle. (note, LW's
style notes are only the first portion of that doc, the latter portion
is other's (largely Tom Christiansen).
One part of that document *does* explicitly address using case to
indicate scope, and it suggests all caps for *constants*, and mixed
case for package globals (the case at hand).
As many people in the community use MixedCase as use underscores to
separate "words" in identifiers.
Your way is in no way the general way, or even the recommended perlstyle
way.