Varying flying speed in transport helicopter?

Does anyone else experience different flying speeds/maneuverability when using the chopper on different servers?
Some servers it’s brilliant and almost like the scout chopper.
Other times it feels so bloated and slow.

I do.
No idea how to explain it.

I don’t know about server-wise, but on different maps I have learned that terrain and weather effects vehicles. A good example are the tanks on a map with hardball roads like Siege of Shanghai compared to the tanks on Silk Road. Pretty it works on helicopters too.

Oh interesting point, I’ll try and notice that in the future.