Well your halfway right. That site is having problems, I promise you. It may of had been good site once, looks like a 30second capacity test, which doesn't get exaggerated by powerboost, but I know for a FACT I can download more then 2.5Mbps. I regular pull 4-5MBps off my Preferred 32/10 Mbps connection and right now its saying 2.7Mbps. Actually the site itself says it's not a accurate speedtest, see http://2wire.com/bandwidth/represent.php
"What does this test actually measure?
This connection tests how fast your computer can load a Web page from the 2Wire Website. It does not measure the speed of your ISP connection, but rather the speed at which the page is received and appears in your browser."
So it says it black and white right there, its only the speed from their servers. Show your friends at work the test at Visualware. I am confident they will be impressed. 
BestBuy..hehe. I have friends that work at Bestbuy.