Is it possible to make Keynote more accurate with autoplaying? I am currently preparing for an Ignite style talk (5 minutes, 20 slides, 15 seconds auto-advancing).

So, due to the talk format, I have set my slides in Keynote to autoplay (Inspector -> Document -> Self-playing, 15 seconds).

However, I've realised that after a couple of slides, the timing starts to be off - such that the entire presentation will be ~5:05 (instead of 5 minutes)

Was wondering, if anyone knows if it is possible to tweak Keynote such that the autoplay delays are more accurate?

Some details:


Using Keynote'09 v5.1.1
Tried using automatic slide transitions with 15 sec delays, same problem
Borrowed laptops from friends and it seems like Powerpoint and Mac Powerpoint seem to be spot on 15sec/slide (total 5min)


Thanks!
My understanding is that this is due to the fact that the slide transition takes a certain amount of time - the 15 seconds is the total time the slide is undistrubed on the screen and it allows a certain amount of time for the changover - the way to check this is to set the timing to '0' and see what happens :)