Depends on how you look at it. Barry dodged real lightning in s2 iirc and even perceived the lightning in slow motion. That feat by itself would make Barry faster but the writers don't know science and throw out random numbers. IMO feats over word of god because writers don't science.
His speed wasn't impressive by the show's own standards this episode. What WAS impressive though, was that he casually busted out of the Pipline. There have been a lot of powerful individuals in those cells, from teleporters to speedsters, and nobody has ever escaped. Barry just walked out without even seemingly using his phasing, which those cells prevent anyway.
Savitar ran around so fast that he was everywhere in the city at once.
I think Barry definitively surpassed Savitar by the end of the season, but some people make the claim Savitar was weaker outside of the speed force prison. OK, but Caitlin stated today that Barry was running faster than anyone ever has before.
Being everywhere in the entire city at once is probably faster than Quicksilver effectively being everywhere in the mansion at once.
I believe he was found 300 miles from his current location. He did run really fast, but all his high end feats are constantly contradicted and he isn't fox QS level. He has never seen a hypersonic+ explosion move an inch every second. QS sees explosions slower than Flash sees bullets. QS also saves numerous people in the midst of the explosion.
This one was pretty good, from Flash's perspective, the crashing train, the people, papers and stuff flying around were completely still, looks a lot like QS's and it was only season 1. Still if only they had a semblance of consistency but he's much slower most times, I think his highest end feat was travelling around the world in the three way crossover.
The issue with the flash is that each episode has a different writer and director.
Like comic books, his feats aren't consistent.
By some feats, he's far faster than Mach 10, yet by statements in other episodes... He is not.
The majority of the audience that watches this show probably doesn't even know how fast lighting or a bullet is. So the statement probably triumphs over the feats... Sadly...
That being said, Fox QS runs casually around an explosion which is easily exploding at Mach 5++
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