Sorry to hear that man, dang I'd be fuming if that happened! Truth be told when our new house was being built, we did NOTHING prewired, 'cept for ceiling fans in some rooms. To put in 'basic' cat5e wiring (I don't even think it included all the rooms, but not sure since the person going over the options with us was horrible at it), they wanted $3000! Keeping that in mind, I know someone who wouldn't even charge me that much AFTER construction!
Either way, the house is in Nevada, we're in CA right now (still), though we will finally be moving there around the end of the year. I am rather sure the wiring is your standard issue house wiring -- good stuff for the most part, here our house wiring was more than capable to drive it
Thankfully, there's a pair of coax going to *every* room, though on our 2 5 day visits there, I was so busy I didn't have a chance to check where it goes, noting that the company was using structured wiring I'm sure there's a cabinet in the attic or something. -- same with phone jacks, though the alarm system we had put in doesn't even work (needs to be "programmed", *sigh*).
Err, back to topic, sorry to hear about that, but the point I meant to get across is that this is one of the reasons why I opted out of prewiring, I had no control over what was going to be used and at that distance (and no way to actively monitor progress, not to mention not even sure where we wanted the wiring), there would have been no way to know what to get
Plus it can get obsolete easily, next time the best thing might just be to stick conduits
