It's funny that when the Yonge extension is discussed, no one ever says "oh, that's way too long for a subway" but when the Bloor extension is discussed "oh that's way too far for the subway to go. No one will take the subway for 40 minutes" (which is a completely stupid point of view, seeing as people already sit on buses for half an hour just to get on the subway and then sit on the subway another half hour to get downtown. I should know, I've done it before, and I've seen many people do it).
That said I think the Yonge extension is important, but having the DRL is more important. I wouldn't object to Yonge STARTING because it's further along, but DRL should be moving along as well, even if it opens a year or two after the Yonge extension. Point is, they are both very important.