I found it to be a little more difficult on a computer because its a bit more difficult to start activating from where you want and opening the right page at random quickly is more difficult to achieve. It forces you to activate from front to back or back to front but the skipping around is lacking.
Personally I find bound books faster to activate whereas computer is faster to photoread. On the whole you would expect to increase your speed in both methods. I consider it wise to practice with bound books because of the physical movement involved that often throws beginners out of photofocus.
Alex
