Is it just me or does Windows Phone 8 lag?

My Lumia 800 did run as smooth as the iPhone 5. On things like opening Apps scrolling Zooming...

But my 8X does not run smooth it lags on the Setting or the Camera App in the Picture App opening those 3 Buttons on the bottom of a app(which opens things like sharing).

This is for me a really really big Problem. Could they change it with a Update?

Even Android on the Nexus 4 runs smooth.

I have the feeling Microsoft did just want fast the new OS and rushed it not even Photosynth is avaible.