From: Bristol, UK
Caught me when I started. The other thing you should probably be aware of (if comparing with RL, not in game) is Maneuver is not just 'how well the plane turns'... it is more 'how agile/useful is the plane in combat'. People read up about the aircraft in game and then look at the stats and wonder. A classic is the Spitfires. I forget the specifics, but later Spitfires turned less well than earlier ones (they were heavier with the same wing, so higher wing loading), yet maneuver goes up with later marks... this is because the power goes up and the aircraft is generally 'better' at combat - more options, better sustained turn, better zoom/dive etc.
As I say, you don't need this to play the game - higher is better (except for reliability )
I have a cunning plan, My Lord