I haven't posted in ages, but this project is too amazing that even someone lazy feels the motivation.
I'm a big fan of your work Bisqwit, and have enjoyed your youtube live programming and TAS stuff (way over my head, I stick to bash scripting nowadays, and just writing for humans
With that gushing out of the way, here is my opinion / mini-rant:
I'm not sure there is a clear answer on this.
Personally, the faster the better.
It takes practice to read quickly (I thank IRC and subtitles) whether in your native language or others (I can't comment on languages that do not use the roman alphabet, for me, if it's letters and roman numerals, I can read it just fine, accents or not. Whether I fully understand something depends if I'm fluent in the language, my vocabulary, familiarity with the culture, idiomatic expressions, and of course inter-comprehension due to similarities with the languages I know.)
I think making it slower (or i.e. talking slowly and loudly) won't help, and frankly is annoying. Try it, speak to someone really slowly and see what the reaction is, same for reading out loud.
I am impatient (sometimes, or maybe all the time) If something is too slow, I tap the "A" button, end up missing the intro, and find myself stuck on the title screen, with a manual reset if I wish to 'try again' (or give it a few seconds to see if the intro will play again.) Or, thanks to emulation, I watch it "fast-forward" (with the music sounding like a cassette just got eaten) just to get it over with.
The thing is, when I want to play a game, I play the game.
Is there a reason that one couldn't pause the text somehow? (I mean within an emulator this is all trivial,) what about something like hold select, to pause the scene? There are times where I do like to admire the artwork, for example the trees and mountains in Castlevania II are my all time favorites- I still remember when I got the cartridge as a birthday present. Throw in the sound track, the ambiance, how easy it is to get lost and it's a true gem (yes, I also like Faxanadu, Zelda II, and Super Mario Bros. 2, the most popular
Keeping in mind the flexibility of emulation (and with stuff like Retroarch with the amazing Braid style rewind, this all seems moot. Of course if you are targeting people playing it on authentic 30+ year old hardware, that's another matter...)
Whatever you decide, just keep up the amazing work.
Thanks to those who managed to get through my rant..
Fast is good. Learn to read faster, or use "pause"
Well the problem is that the intro is completely missable. Under emulation I can pause the emulator and read the damn text, but if I put the rom on my powerpak, then I'd just miss it. I hate being stressed like this when reading.
This kind of remembers me the intro of Deadly Towers who scrolls so fast it's impossible to read it.
To me this is a win. Know why? You now have a reason to watch the intro over again. And maybe again. From the author's perspective, I'd go with 'fast'.
Besides, as Bisqwit mentioned, your mileage may vary. "Slow" is still going to be "too fast" for some, and "Fast" is going to be "too slow" for others.
Maybe the best solution is offer a few suggestions of some NES era games that had an intro speed that you felt was "just right"?
EDIT2: P.S. Bregalad, loved your work on the ff gba games soundtracks.