Jiggs is used by three people in our entire state. >_>;
Magus, Jigglymaster, the kid that teamed with doteater at one of the bi-weeklies, Eggm, Zeus15King, Atomsk, doyoung's friend at rutgers, dmbrandon, and even I can play a little jiggs for teams.
But that is besides the point-(Sorry this was poorly written, but has good points)
People have always discluded doubles because of many other reasons. Doubles complicates things. People like Wes and playing with people like PC make things ultra hard to determine. You can never tell from teams results how well each individual player in a team did.
When you make a power ranking, you want it to be as objective as possible. This way when people say "hey why is this person where they are?!" you can throw tourney results in their face and say "cuz they've proved themselves in tournament by getting the following results".
If you try to use doubles results, people can still argue that they didnt deserve their spot because their teammate was what made them win. Also people do well with some teammates and not others. So how sure can u be about their team skills?
People have never made a teams power ranking because besides isai, it would be REALLY hard. If you could rank a one specific team like "isai and ken" or "taj and forward" that would be easier. But people switch teammates, complicating things a whole lot.
Bottom line- its just too hard to make an objective process.