Look WING,
I was being sarcastic, but you should really try to do some research before you post. Or, simply wording your hunch in the form of a straight question--it can help you appear like you want to learn instead of merely repeating something you saw on Wikipedia.
For example, "I was looking at the climb rates for the P-51D the other day on
www.p51fan.com and thought I saw a discrepancy between their posted climb rates and the climb rates of the P-51D in-game. Can someone help me understand why they are different?"
[edit] When comparing something out of game, always link your source so that others can take a look at it.