Web pages load SLOW on IPad: how to disable DNS prefetching; other ideas?

Brand new IPad 16 GB WiFi + brand new Airport Extreme in bridge mode. Comparing IPad web page load speeds with side-by-side WinXP computer running IE8. Any web site will do: take www.apple.com if you want.
Problem: IPad web pages generally load much too slowly compared to IE8 on a computer 6 inches away on the same Airport Extreme network. Maybe twice as slow at worst, occasionally not much slower, but generally pathetic and annoying. WiFi signal strength is "excellent". Airport Extreme network is working great with all my (Windows) computers and devices except the IPad.
I already switched to OpenDNS on my Airport Extreme; didn't help noticeably. I would like to try disabling DNS prefetching in Safari, but don't know how to do it on the IPad. Question #1: How do I disable DNS prefetching? Question #2: Any other suggestions for this embarrassing (to Apple) problem?

I'm experiencing a similar problem with a new iPad 2 using iOS 4.3.3 connected to the Internet via Time Machine to a DSL line. The Speedtest X HD App shows the connection speed to be fine (about .6 Mb / s). The problem is only with accessing web pages. I frequently get a "server not responding" msg. There is no problem when I connect the device via USB to an iMac, only through wifi. The iMac itself (Intel with OSX 10.6.7) periodically experiences problems (both Firefox and Safari): I have learned to solve it by cleaning out cache and fixing disk permissions periodically. I've tried cleaning out cache on the iPad, deleting cookies and erasing web history, but that doesn't seem to make any difference. The problem reminds me of an old VNC problem: you had to allocate a large amount of cache or streaming would stall. This is also happening with the iPad 2. Maybe the problem is a DNS channel issue but my impression is that it is somehow related to a memory or cache issue with the iOS device or to Airport. I've occassionally experienced similar slow page loading problems with other Airport connected devices--it varies from device to device. It seems to be a client-side software or caching problem.

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