How about the 2010 GPF when DW only won by 9 over P/B? That has been the closest DW has come to losing.
This is incorrect. P/B were very close with D/W during the 2007-2008 season and were just behind them for part of the 2008-2009 season. They beat them at 2007 Skate America by about 13 points (although Charlie had gotten off to a very slow start that year due to injury.) In fact, P/B were winning GP medals before D/W.
http://www.isuresults.com/results/gpusa07/CAT004RS.HTM
Regarding margin of victory, D/W were behind K/N by 15 points at TEB that season and nearly 20 behind DelShoes. They did not settle for remaining behind them, but worked harder to improve over the next couple of years.
At Worlds in Sweden in 2008, P/B were leading D/W through both the CD and OD and barely lost to them by 0.68 after the FD.
BTW, depending on the number of lifts chosen, there are 1-2 fewer scored elements now than in 2006 since only one set of twizzles are called for.
There is nothing wrong with separating the teams based on high quality GOE if that is what the rules ask for. Perhaps the more accurate problem is that the rules as written may be too hard to execute well for some of the lesser teams. Those who excel at high levels of difficulty and who manage to weave it into their programs relatively seamlessly only look that much more superior when harder content is required.