Before they fixed the Aerodynamics Expert skill (40% now instead of 100%), my fully specced 262 would cruise at 824kph and max speed at 1000kph. It could pull against anything, even Tier 9 Heavies because there was only a 175kph difference from cruise to Max speed. Now it cruises at around 760kph with slower accel. I can't pull away from J8M's & Ho 229's. P-51H can even stay on my tail after a merge and spray enough .50 cals to catch me on fire...
It has def been brought down to Earth but if nothing is directly engaging you, like Rei said, you can do everything you need to do as far as capping. Like Desert said, if you are engaged you pretty much need full boost avail to get out of danger whereas before you didn't.
A lot of ppl talk about the 30mm's low velocity but I disagree, it's the aiming and use of rudder/pitch up. As Rei explained to me one time, he can fly with fully manual controls during a dogfight and only use the mouse to finely aim when firing. At <500m it doesn't matter too much about the velocity, esp. with bombers, GA, or other Heavies. Only twirling LF's will really give the 262 issues, but you shouldn't be fighting LFs too much anyway, you have bigger fish to fry.
Aiming at the cockpit, being above your opponent, and using pitch up to get the last ounce of lead on a target all outweigh the low velocity that most players think is a weakness.
It's my fav aircraft by far because it is all or nothing, I hardly ever feel cheated while flying it and knowing that it is seen as a "difficult" aircraft to fly adds to it because it's not like I'm spamming EF-131's, XP-31, Spitfires. XP-54's, RB-17s (pre-nerf). My 2 cents.