I received a visit from a line tech who found an error outside 'on the line', but didn't go into much detail.  That's fine with me.  UV Realtime reports est. dist to VRAD as 2100ft now instead of 2700 or 3000.  It has only been an hour since he left and I reset the GW, but I am locked in at 13200/1528 according to the stats.  My upload speed tests are still topping out at ~800K, but I'll take that.  In 46 minutes since reset I've only had 2 corrected blocks reported, and no signal/margin/framing failures.  I downloaded a 2GB ISO from Microsoft at 1.2-1.4MB/s to generate some traffic.  I will watch it over the weekend and file a final report if all goes well.  AT&T has made the effort for me on this one, and I appreciate it.