Noticed this a while ago. I read well but I'm concentrating so hard, I'm not paying attention.. well, can't pay attention and so have no idea what I just read.. at all.
It's also like when I'm reading the words, I'm not looking directly at them and just racing impatiently to get to the end.
A bit like (which I think is more common) listening to people speak and getting annoyed that they can't talk faster and you finish their sentence.

Anyone like this?
I've been doing tests for dyslexia, but not convinced it's that.