Admittedly, both pages seem to run under the assumption that you will write your talk and then read what you've written
I have noticed that this seems to be really common in history- and humanities-related fields, and really rare in science. I am with you that the better talks are not read.
The method I use is 1 slide per minute, leave 5 minutes for questions. So at the conferences I've pretended at, for a fifteen minute slot I'd have ~10 slides, and if I ran over ten minutes a little and only left 3 for questions, I did not feel very bad about it. I make notecards with prompts on them, but rarely actually look at them when actually presenting. The slide:minute ratio will of course vary--data-heavy slides take longer to discuss, background slides or "look at these pretty picture" slides are faster. So if you have more of one kind than the other, that definitely changes the ratio.
no subject
I have noticed that this seems to be really common in history- and humanities-related fields, and really rare in science. I am with you that the better talks are not read.
The method I use is 1 slide per minute, leave 5 minutes for questions. So at the conferences I've pretended at, for a fifteen minute slot I'd have ~10 slides, and if I ran over ten minutes a little and only left 3 for questions, I did not feel very bad about it. I make notecards with prompts on them, but rarely actually look at them when actually presenting. The slide:minute ratio will of course vary--data-heavy slides take longer to discuss, background slides or "look at these pretty picture" slides are faster. So if you have more of one kind than the other, that definitely changes the ratio.