While it seems they've fixed-ish most channels, YTV still has this problem TO THIS DAY. Check out the schedule on their site, which now shows which programs have DV. Freaking annoying. I've been trying to get them to fix this for a good part of the year, with little success.
(I say fixed-ish, cause if you watch a recording and turn on DV on the previously affected channels, it won't turn off normally; instead you have to exit and go back into the recording to watch it without narration. With YTV it's on even if you've never touched the option. Still, one year later!)