Hmm.. as loathe as I am to admit it (because the point was brought up by certain players on whom I wish physical harm in Colorado), I think a lot of these could be re-examined.
Sonic can reliably spring out of the CG, while Snake, Pit, and DK seem to be able to jump out even when the throw is buffered perfectly.
I personally am leaning toward Pit being CGable, but I think we really need frame data on all three of those characters in particular.
And before people start in, LEAVE ANECDOTAL AND SPECULATIVE EVIDENCE OUT OF THIS.
For example, if you believe the CG to NOT be escapable, saying "You're not doing the CG right," isn't proper evidence. You can't say for sure that they're doing it wrong.
Conversely, if you believe that they ARE escapable, saying "The people you're playing suck if they can't escape this," is a poor response as well. You don't know who the person has played, and they could be very good at the characters.
What it comes down to is needing 100% accurate frame data on this. I personally think that Pit is inescapable (although Colorado disagrees with me strongly), Snake might be debatable, and that DK and Sonic are both entirely escapable. We should get some more research done on these guys.