This is exactly in line with my own experience. I noticed that I had completely stopped thinking deeply and creatively as I used to, and it coincided with my use of social media as a mental "palate-cleanser" at work. I was filling all of my spare moments with the mental equivalent of processed snacks. Once I stopped, my mind returned to filling that void with deep thoughts and creativity.

I really think social media is altering our attention spans and changing our minds, for the worse.