Experienced speakers, what's your prep time factor for a talk you consider useful, solid, and well delivered?

Assume "talk time" is just the time spent on stage, and "prep time" encompasses all of drafting, writing, preparing slides, editing, and rehearsal. (Including any work you spend on the talk proposal, of course.)

"For every minute of talk time, I spend ___ minutes of prep time."

Boosts appreciated.

A: 10 or less
6.1%
B: Between 10 and 30
53.1%
C: Between 30 and 60
34.7%
D: More than 60
6.1%
Poll ended at .
@xahteiwi One thing I noticed early on was that the quality of the talk (or workshop) improved a lot when I wrote a proper script first that could be its own publication and then disassembled and rearranged it for presentation. I think that is also a more efficient way to do it, but sometimes it doesn‘t click for me. Another option is to review story telling guides (like Squirrel inc) and decide for a story structure first. Other times a „light table“ approach helps me think.