Blk,
Let's look at this from a different perspective for a second. I remember seeing a post by Paul in which he states he PhotoRead approx. over 1500 books the first year he started doing this. Quick math would indicate that this is 4-5 books each day on average for the WHOLE YEAR. See?
We all know Paul is the best, and in our mind's eye when we watch or hear about him on the infomercial we all picture ourselves being at or close to his level someday, preferably sooner than later
. So with that in mind, I don't think it has to be a hard and fast rule to read 5 each day, or 10 each week. Devote as much time as you feel, intuitively, is helping you advance your skills. Elmo has said he has PhotoRead 100 books in a day, and we all know how confident he is in his progress so far! If you enjoy doing 10 books in a day, then do it. If you lose focus and energy after 3 or 4 books, then I wouldn't beat yourself up about it. On the whole, they seem to be telling us that MORE PRACTICE is BETTER if we want TO ADVANCE ASAP. But don't pressure yourself 
Unless one of the teachers or experts wants to step in here and contribute, that's the best way I can express what I've gathered from the posts I've read thus far. By the way Blk your posts have been very helpful to me as well!
-Bran