So some people seem to say. Really, I find my plastic guns to feel more like toys. That's one of the things I love about the M9 - its weight and feel. Honestly, I hold my WA 92FS "Perfect Version" and it feels like a toy, even though it's much higher quality. I love my new TM P226, but it also feels so lightweight and toy-ish compared to the KJ (and the irony is that they're actually ALL toys! lol).
I can imagine if you spend the big bucks for high quality metal frames and slides for a TM or better gun, it will feel much more solid and 'real' than the KJW will, but for the price, I think you get a whole lot of bang for your buck, even compared to the higher quality ABS guns.