Moonlight, I think you would find the book helpful, I really, do (how's the singing?). I know you like to question and analyse the purpose of advised actions, as I do, and it really addresses the "what are we doing this for?" question. In fact I would go further - I wouldn't want the visual timetable without having taught the teachers "why" they are using it (have already thrust the book at them needless to say).
If your child has a receptive language problem but no problem understanding what he sees, then they call that being a visual learner. It doesn't mean you have some special extra visual-learning unit in your brain!
Grumpy, I don't think a timetable is a "prompt" that has to be faded. I think we use timetables (in the form of electronic diaries and calendars) throughout our lives and especially in our working lives and that these could be particular useful upon leaving school (getting that supermarket shop and laundry load diarised would certainly help me).
Going back to the whole class versus individual timetable issue. Our SALT has suggested DS2 have own individual timetable. Our nursery manager hates this idea as DS2 (i) has no problems planning (ii) needs to be with his peers not taken away to a special room and (iii)is rapidly improving in his ability to enjoy the variety of activities on offer during free play.
Needless to say, our nursery manager is too polite to challenge the SALT and has instead quietly dropped the whole visuals thing, leaving guess-who? to bang their heads together and get things done.
I have put these points bluntly to SALT today who has said she is happy with a whole-class model provided her view on his planning abilities matches nursery managers' and mine when she next observes him. This time last year, (he's now 4.1) visuals really helped him choose his activities and deal with less-preferred activities. Now he is ready for different and more complex visuals.