Aren't a lot of those cars modded though?
Most of the top times have associated build threads, you can look and see how many mods were on the car when the time was posted.
That thread you linked means nothing. 90% of those cars are not just tuned. He asked what will be quicker the ST or a tuned Sonic. It's an easy answer the ST will be quicker.
Going off Trifecta's dyno chart with just a tune the Sonic makes (IIRC) 154/194 to the wheels.
The ST is rated ~190/200 IMO it will put down more HP to the wheels than the Sonic with ease. Once tuning is available it won't even be a fair comparison.
He didn't ask how a tuned ST would compare to a tuned Sonic
I admit a stock ST will probably end up with a bit more whp (maybe ~167) and should be a bit lighter but will also be putting out a bit less torque. Again, in the real world of two lane passing and general 'fun' driving, I don't think the difference will be that significant.