Eli, the cable in my house was completely re-wired, all the way back to the pole, when we moved in 13 months ago.  I had a free install deal and the techs (who were independent contractors) just went to town.
I just did some new speed tests and it was back up to 1740/248 so I guess all is well.
I was just venting on Comcast earlier.  Unfortunately, there are no good alternatives to them, but I am very, very sick of their business model.  It basically involves upselling the customer's service by promising a promotional discount, and then not coming through with the discount on the bill.  If the customer even notices the "mistake" and makes the effort to call in, they are then told by an overly rude CSR that they have no record of the discount and "did you fill out the 4 page application in order to see if you qualify to receive this promotion?" (actual CSR quote) which of course I was never told about or sent, I was simply told (like in this most recent case) that I would get the first 4 months of my new upgrade for free, or that if I got both internet and digital cable, I would get $10 off my bill for the next 12 months.  They don't tell you that you'll have to fight over it because their very business model involves gross criminal misrepresentation.
To you and me, it's just $5.99/mo.  Fighting might not be worth the hassle.  But to them, it's $5.99/mo. * 1,000,000 subscribers...