Well I made a big enough stink at XO that they had one of their line engineers sit down and look at the last mile. He found some issues with a repeater and they are supposively rolling a truck today (saturday) to replace the repeater at some point.

No, I did not talk to the engineer, they opted to call a customer who probably dilluted the message so much it doesn't resemble what they actually said. The "proof" in the pudding will be if I log a d-channel drop/red-alarm at some point during normal hours tomorrow. I can only assume the repeater is on the TX side as i'm not registering any errors on the RX.

Yes, is is configured for normal (CPE) timing, meaning it receives timing from the line. I plan to take a swing by their place monday, plug into the smartjack, see what I can see, reseat it, test the cable, reterminate the cable, retest the cable, and see if my BPV's go away.