I doubt this is helpful but you are not alone...
I am so tired of hearing about comprehension!!! I do realise it is important, thank you very much.
The only thing that has helped is outside testing achievement testing (WIAT-II)... reading comprehension grade equivalent grade 7:2 for my newly 8 year old (mid- year 2). Decoding he maxed out (year 12:9), I am not saying he knows every word he can decode but clearly he is reading well above grade level!
Never mind, I explained he read The Hobbit between year 1 and 2 (and was upset with the first movie only covering a small bit of the book). The full Eragon series, Harry Potter, etc.
I remember asking his teacher when he was age 5 to explain how he could possibly spend so many hours on end reading if he didn't have a good idea of what he was reading.