No, not really, but okay lets exaggerate things. iOS 7 runs very smooth and responsive on both the A7 and even the A6.
By the way, the graphics in iOS 7 are far more taxing than the textures and gradients were in 6. Textures don't use CPU, thats just artwork. However, heavily blurring live content in a layering structure, physics engine built into view controllers (UI Dynamics), and particle effects DOES use a significant amount of graphics sophistication to pull off. And 7 runs these graphical effects beautifully and smooth. The graphics in 7's user interface are far more advanced than 6's, even the animations are more sophisticated than OSX. "Simpler" does not mean dumbed down.
You wanna know why its not as PERFECTLY smooth as iOS 6? Because its a brand new piece of software. It still needs optimization. Just like every new piece of software. But as someone who has used Apple software for 15 years, I can say that this is a very stable 1.0 release in Apples long history. Not yet perfect, but nowhere NEAR what you are sensationalizing. You're making things up to justify your disliking of it.