> Yet why "previous presenter experience"? If you are afraid of inexperienced speakers to deliver a boring talk, why Not just give them a 10-15 minute slot?
That makes it even less likely that the talk will turn out (as well as complicating the conference schedule). Giving a 30 minute talk is much easier than giving a 10-15 minute talk. "If I am to speak ten minutes, I need a week for preparation; if fifteen minutes, three days; if half an hour, two days; if an hour, I am ready now."
Many conference organizers will give some slots to brand new presenters, especially if the topic seems interesting; they just want a good balance of new and experienced presenters. But a conference that has so many talk submissions that it has to reject incredible talks can afford to be more selective.
That makes it even less likely that the talk will turn out (as well as complicating the conference schedule). Giving a 30 minute talk is much easier than giving a 10-15 minute talk. "If I am to speak ten minutes, I need a week for preparation; if fifteen minutes, three days; if half an hour, two days; if an hour, I am ready now."
Many conference organizers will give some slots to brand new presenters, especially if the topic seems interesting; they just want a good balance of new and experienced presenters. But a conference that has so many talk submissions that it has to reject incredible talks can afford to be more selective.