I just checked mine too and they doubled it. It was 30 and now it's 60. Not as great. They said it was already upgraded and I didn't need to call, but my speed tests were 30 before I called and 60 after I called....hmm.
what was the uptime on the modem? It might have just needed to be reset to pull in the new config. They can reset the modem remotely and they pretty much always do for support so I wouldn't read too much into your speed doubling.
