Now, are we supposed to differentiate from posting from a Tablet w/ a keyboard, vs one w/o vs. using an iGo, etc.

I like sitting in the airport (like this morning) and browsing and posting with my stowaway.
posted from a desktop.

The easiest implementation would be to permit users to select one of several pre-sigs; these would be inserted before the signature as part of the post. The user could make a list of pre-sigs, and select from his list in a dropdown box on the Go Advanced page.

(Failing a vBulletin implementation, this could, of course, be implemented as a Greasemonkey script.)

Nice idea. Could be something in the User Control Panel that can set defautly; but then be used on the advanced post screen if someone needs/will change it because they are posting differently.

Given that graph posted above, I understand why, but still think its kinda weird that more people aren't using their ITs to browse the board. Performance not withstanding, I wonder if it has more to do with just the way the site sits on the IT (not getting into that design convo again, but its somehting I was thinking).

It's because they don't know about Classic theme and CSS, or thought it was too much work to set up.

And also, there's visitors who stumble in from Google.

And people with there tablets in reboot loops, asking for advice on fixing it, though I think that's one of the smaller contributions...