This has to be true! Last night I spent a good deal of time playing on a Kurzweil stage piano that had weighted and full size keys. I played on the Kurzweil for at least an hour, and when I went home and played my PSR-550, I felt SO cramped.. I think the over all length and width of Yamaha's PSR's are not truely full size as advertised...

Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.