I've had it go up as high as 13.x, too.
Of course, if I test through St. Louis or Chicago, it doesn't go above 4, and of course, those are the routes my ISP routes me through to EA's west coast servers.
Part of the problem is that I'm literally a few thousand feet from the furthest distance my cable co. will offer internet out to (probably a good 15 miles from the hub of the local branch of the system), and that they inherited really crappy infrastruction from Charter when they bought Charter's KY operations. Even the installers were getting half the signal strength here that they were supposed to be getting, when they were doing the install. But, it was better than what the phone system had to offer (the phones weren't reliable enough for conversations, let alone dial-up - Alltel was letting the phone infrastructure slip faster than Charter was the cable - and NewWave's done more meaningful infrastructure modernization than Windstream did, to the point I finally went to VOIP in disgust).