Agree, mine was 63 slides, almost all imagery type slides. Some of the best section briefs I have ever sat through required little more than a map and two post it notes. The problem though is that now advanced quals and designations seem to require the PowerPoint Opus.
Sorry to be a thread resurrector...
I just did my NSI check in my new bird. We clocked in at in the high 50s for the section work, plus another 10 or so for the single ship work.
I guess everything changes when the briefing spaces have giant touchscreens, vice a 1-gun and having to drag a laptop from an office, or worse, a transparency projector. We all blow the curve for each other. By next year, FCF hover work in the midfield grass will require Flash video and sound effects.