I already tested using 1400 pixels for IOS5.1 on my iPad1 some time ago with this demo.
http://qtvr.dk/ipad-1400/
Even if it contains sound and a video + a slideshow it worked fine.
So I thought i would try it as standard for my tour for the National museum.
But that does not work.
Here is a test version. It has 1414 pixels tablet images on the first 4 panoramas. No 5-12 uses the 1024 level from the desktop images.
http://virtualdenmark.dk/dnm1/
Both uses the <display html5rendermode="2" setting
The loading and panning is very jumpy on the first 4 panoramas. if I manage to even load the first view without crashing. Apparently the difference from the first test is the hotspots and text boxes.
The initial pano also has a video you can click to view.
If you go on to pano 5-12 everything work perfect.
I would appreciate some feedback from people with iPad 2 and 3
Hans