Since it is a frequently asked question on most web and interaction
design lists, I thought I would forward this from a friend of mine
who is pretty good at research and analysis....
Here's the results of part of review on screen sizes he did for a
client, sanitized for thier protection, but most likely still pretty
Audience size about 20 Million Users, 90 Million Visits
Reporting period covers January 2007-May 2007
Have at it:
Jeffrey D. Gimzek
Digital Experience Designer
A related discussion to screen size is on page fold and user's
scrolling. This discussion often goes hand in hand with discussion of
a user's screen size.
The best post I've found on the subject is "Unfolding the Fold" from
If anyone has more recent or similar info it'd be interesting to see.
Nutshell: people scroll so the desired design outcome is to have a
page that is highly scannable, or that scanability is only more
important now. (This of course is often more related to
non-transactional centric sites/screens.) Another take-away seems that
a well designed long page may be less of a barrier than asking a user
to click elsewhere on shorter pages, or that this at least is an
increasingly significant design decision to make given the problem you
may be trying to solve for.