Would you rather have your sports in stretch-o-vision or letterboxed?

Going back through the files, we noticed that Canada's The Score announced last week they were launching the nation's first HD sports channel that is widescreen 24/7. They're achieving this by stretching any 4x3 SD content to fit a widescreen frame, much like TNT does, no word if its the exact same technology.

They will be unveiling native HD content (no stretch-o) during the NBA playoffs, but till then, do you prefer the way ESPN (and presumably TSN also?) does SD. or do you want full frame upconversion, no matter what the distortion?