I'm not sure if this is the point, but sometimes when I'm in presentations at work, rather than just give me the information and let me go along my way, they have to try to make them "fun"... maybe so it seems less like work? So here I am, setting for hours in a presentation with all these extra activites and for warm up or wake up, or whatever that don't really have anything to do with what I'm actually trying to be informed about in the actual presentation itself. Makes me feel like I'm in kindergarden. Just tell me what I need to know and let me get back to work.
I see several possible messages:
1. The previous guy took up 58 minutes of your hour
2. Most presentation can be done in 2 minutes in what other people take forever
3. They really don't have a p[lane to catch, they just can't bear to sit & watch.