Users dont. The average user doesn't give a shit. Only web designers
care
And your experience in a usability lab is what?
Please refrain from commenting on what users want until you've spent some
time in a usability lab.
So suddenly you know me?
I've spent a lot of time as part of various UAT
and OAT teams in the past. I'm speaking from experience, not making it up!
Common comments heard by users when experiencing i-frames run along the
lines of "why is all this information in such a small space?"
Yep, it happens. There's a time and a place for iframes, or scrolling
layers - even fixed fonts, Flash and DHTML. Each of these could be bad, but
used correctly they can be assets.
Performance data indicates that users' ability to find information that is
contained in i-frames is also lower than it would be otherwise.
That's to broad a brush honey. You cant make a statement like that and apply
it to everything. While iframes inherently have issues, that does not mean
that they are useless - it just takes a smarter designer to apply the
functionality only when called for, and in a way that does not limit the
user or distract them from the content.