Ask yourself how much time you spend on MR alone, and whether it is not time that would be better spent reading
. And how much of the time spent here is to avoid reading rather than further it?
Now, add email, SMS, social media, news, etc etc etc.
I admit my attention span has been shot by the internet. My iPad calls to me like the sirens.
The novelist Gary Shteyngart says he has a really hard time concentrating on his reading without taking himself out of wireless/wifi range. And he's a professional whose job partly is to read books and review them!