I've been doing some reading and viewing several videos. I've read and heard about high performance single engine planes when discussing General Aviation. Being new, I can figure out that a Mooney is a high performance single engine airplane. My question is this: Where is the "cutoff" point between regular and high performance? Is the Cirrus R20/R22 considered high performance? Diamond DA40? Cessna 182T?

Thanks in advance for your opinions.

David