iPhone Data Speed

According to Apple.com:

That site is about 740k (as of right now, I assume it was about the same when Apple tested it) so that works out to about 37k/second. If that's how fast the iPhone can download data, then to use the 400mb/month allocated in the cheapest $60/month Rogers plan, you'd have to be downloading data for 3 solid hours every day of the month.

The interesting thing here is that 38k/second is nowhere near the capacity of the 3G wireless network. Why is Apple advertising 37k/second as the iPhone's download speed?

For comparison, here are some users comparing download speeds from the 3G network using a laptop - at 241k/second, that page would have downloaded in less than 3 seconds.