I had changed the WiFi conection in my PC to the 5.0Gz band, so I take the best speed from my network (although my Internet conection is only 50Mbps), since I was 3 meters away from the router, I thought the lost of signal won't be a problem, and the iPad was running allways in the 5.0Ghz band.
Changind the PC back to the 2.4Ghz band fixed the slow motion problem debuging my App, even the typing in the edittext was slow.