Jay Honeck wrote:

All the controller cares about is your speed. So he wants to know if
you are a "Cherokee" (Warrior, Arrow, ....) or a LearJet or a heavy.
That tells him about times and congestion problems, his job.

Well, they care enough about the speed differences between a Warrior and a
Dakota that they changed them all from PA-28s to P28As and P28Bs
respectively.


Right. A Pathfinder/Dakota cruises more than 20% faster than a Cherokee
140.

Around here we very rarely see cherokees. People just don't find them
useful for mountain flying. If a pilot call in and uses Piper 12345 he
will get asked what type Piper. More than likely it will be a cub. I
care about the speed difference between a cub and a cherokee. Between a
cherokee 235 and a 140 isn't relavant to my planning.