At N. Perry in Hollywood, FL, I picked up a private pilot student who had been struggling to get soloed in his own SR22.
I got him soloed in short order and then successfully through first his private, then his instrument.
I personally would prefer to teach in a simpler plane, but if one can afford to train in a Cirrus and has an instructor that can focus first on fundamentals, it certainly is doable*. I just think a lot of time has to be spent the the gadgets dimmed so one can focus on the basics at first and not be distracted.
*Isn't the Air Force using SR20's for primary training?
As their instructor, I think that was a great call.... Have the student focus on airspeed and then expand on other items later ...
Fly the plane first....