I'd beg to differ. Flickering Kilometers around the Juubi battlefield and placing multiple markings before Tobirama arrived at the battlefield is an extraordinary display of Shunshin.
I'm not, but reacting to someone twice doesn't denote equivalent speed or reactions. Deidara reacted to Hebi Sasuke twice, but he was conspicuously inferior. Since all Uchihas are fast, then Minato's feat of bam-flashing Obito should suffice in accentuating the height of Minato's reactions.
That is something that happened off Panel. You don't know how long it even took for him to get there. His on-panel feats are medicore at best compared to good speed feats from the likes of Uchihas, Ae (V1) and Bee. Tobirama's and Hashirama's speed is nothing special if that is what you are implying that outspeeding them is some huge feat. The former has far better reaction speed than Minato, though. Mind you, Madara made a short work of the latter when Hashirama was in SM. He stabbed him about seven times with the rods. Also, why can't Ae (or other speedsters) do the same if given the chance? Or better even?
I am talking about reactions not teenage Bee's foot-speed, which is far superior to Minato in his adulthood anyway. Reacting to someone teleporting does mean better reflexes. Do you actually believe Sasuke went at him with the intent to kill or strike him down like he did with Tobi? He was holding back, which is proven because of Deidara's own claims as to how he continued to fail despite upping the chakra blasts' speeds of his Clay based bombs. Sasuke managed to out-speed all of them with ease. Look at the complete picture and not a chunk out of it.
Or are you going to tell me that Obito slapping Naruto around and dodging Gai and Kakashi as well doesn't mean he has better speed? Or Bee reacting far better to controlled Jins compared to KCM Naruto doesn't mean he is better? That isn't the case with Bee. The manga clearly showed what happened. Bee showed superior reflexes. It's just a narrative you are following that has been built up on empty and ludicrous hype that surrounds Minato. There is zero evidence to suggest in the manga that Minato's speed comes even close to V1 Ae. Why? Because there are no scans to prove it. No scans means it's a narrative.
You are talking about a feat of Minato teleporting behind a 14-year-old Obito's head and claiming that he has superior speed and reflexes, when the latter isn't a sensor? Are you translating the same thing to his adulthood? That seems really fair and really logical. Or that Obito where he had rods stuck in his back and couldn't even move when he was being controlled by Madara? Really? All right.