Having just recently been a Lancaster Pilot on an HQ raid this weekend. I can accurately say that if your bombers are being torn up by a jet-jock, then it is either 1 of 2 things.
1: He's using proper tactics and attacking your blindspots all the time. In which case, it doesn't matter if he has a Pony, Jug, 163, 262, 190A8, Tempest, Lala, Spixteen, whatever. If he's using it right there isn't alot you can do. Except bob and weave.
Or.
2: Your bomber gunnery needs alot of work. I killed 2 Me-262's and smoked a third that later crashed the other day on our return trip from the HQ raid. And I suck at bomber gunnery. Here's the vid clip of the action:
*Edit* Disregard for the moment, the vid isn't working for some odd reason, will fix soon.
Now I'll admit... those 262's made some really poor choices... but still...
163's shouldn't be mega-perked just because they are better natural bomber killers, or because there were so few in actual existence.
It really all comes down to the pilot.