Everything Apple (the Mac heads thread)

Really? Seems fine to me. Same speed as if you had a chip in the iPad. I've had no problems using it to send high res photos from my iPad to clients on the fly.

Yes, it's the same speed as if you were browsing 3G through the iPad (or Edge, or WAP, depending on what's available wherever you happen to be) but that is still slower than WiFi by a huge amount, and often slower than looking at the same stuff on the phone, as you tend to load more data on an iPad than a phone.
This may also be because O2 has shitty data bandwidth.