Yes it does climb more slowly with 20 degrees of flap than with none. Are there aircraft for which this is not the case?
Of course not, that's expected. All I was saying is that compared to the aircraft I am used to, it seemed quite slow. In the Archer III the recommended flap setting for a short-field takeoff is 25deg. She will happily climb at 600 fpm in this configuration.
This particular aircraft was also fitted with a G1000. What is the technique for reading the speed tape? It was quite bumpy and I found it hard to tell whether we were accelerating or decelerating. It was just a mish-mash of digits with the only legible figure being the 10's. As for the PFD, this beautiful attitude indicator must make instrument flying much easier?