Hi, 15 minutes is a better time frame.
If the presenter cannot get across several good reasons why his/her language is "ideal" in 15 minutes, then an extra 90 minutes won't help.
Further, most people in the audience have had a long hard day at work - will they be up to long detailed talks on esoteric weirdnesses of a particular language?
Reducing the time available forces the presenter to be concise and to the point. - which is good.
Much as I'd love to expound the virtues of python for 1.5hrs, you are absolutely right in all your points. 15min + 5min questions. We should have a timer up the back with a silent signal at 13min and a loud gong at 15min.
Cheers, Carl.
