Interesting, Standard is 20/1 in your area? TWC is really all over the map.
I had Turbo test out consistently at 20/2 for a year here; I got it at a promotional rate for 12 months. After that, when I called to downgrade back to Standard, TWC tried to hide the fact that Standard even existed and wanted to give me some kind of 3/1 package, probably hoping I'd freak out and keep Turbo. When pressed, they admitted that there was a 10/1 package.
At times I've tested as high as 20/1 on Standard but I believe it's been due to PowerBoost. Typically I'd be more sure about PowerBoost's effects, but comically I only seem to notice it kick in when I'm doing speed tests and not when I'm actually downloading anything.
As a TV non-subscriber, TWC wants about $53/mo. from me for Standard and about $73/mo. for Turbo. That makes Turbo too rich for my blood...but if Standard moves to 15/1, that $53 will at least be more palatable.--
"The counsel of fools is all the more dangerous the more of them there are." -Ólafr Höskuldsson