Thanks for all responses!
My old MBA is running about 2000rpm, MBP 2013 15" (2,3Ghz) is about the same. When I looked at 1300rpm I didn't know what to think.
Still one doubt though..
I believe I never saw fan speed higher than 3500rpm
examples (my MBP is 2,4Ghz, 8GB, 256 SSD):
geekbench 3: 1300rpm
cinebench cpu: 1800rpm
cinebench OpenGL: 3200rpm
could you publish yours? is this also normal?