Don,

The main difference is that I've yet to see a hardwood peg in an old frame in Georgia -- they're all heart pine. sometimes 30 rings to the inch. Mostly 1" holes. Pegs are riven and shaved to a taper. Some octagons, some rounder than that. All draw bored. Some crude, some well made. Sometimes in the same frame.

Honestly, I am often guilty of not looking closely at the pegs in a frame -- something I think a lot of us do. That is one of the main reasons I started this thread. If nothing else, a few of us will be paying more attention to the lowly peg next time we visit an old frame.

I can't think of any cases of things other than joints being pegged that I've personally seen. Oh, here's one. The window and door bucks on hewn log buildings were usually pegged with fairly large pegs -- 1 1/2" or so to the end grain of the logs. I've seen a few of those.