Comparing TC to St Clair is silly, and makes you sound silly.
It's only used by Kouvalis mouth-pieces so they can associate TC with the problems that came with that line's construction, and the perceived injustices done to automobile traffic on that street. It's meant to drum-up support from people who get angry over St Clair, but don't actually know anything about what happened there (and haven't been there since it was completed, if they ever had been in the first place.)
If you're going to compare any existing TTC streetcar to TC, at least use the Queensway segment of the 501. It's not a perfect comparison but it's a hell of a lot closer.