I've seen three different methods work.
1) The straight to the point.
2) The slow and steady.
3) And the 'Three Weeks Earlier...' where someone starts the story with action and then backs up to the slow and steady parts leading up to it. Attempting to hold interest with good at-the-moment storytelling, but also with the promise of getting back to that 'cool' part.
Now personally, the 'Three Weeks Earlier' shtick is a pet peeve of mine, but it does work, so I can't disregard it. In fact, I honestly can't say any of the three are right or wrong. They certainly have their strengths and weaknesses. If I were to choose just one though, I prefer the slow and steady. So many good stories have started with 'normal life' that's shattered for good by the end of Act I, which fits the structure of a three act story anyhow.
My upload here on Tapastic, Her Shadow, is in manga format, so follows an intro-boom-resolve approach. It's a foreign writing pacing for me; I'll admit, but I like the challenge. I also find it interesting, because my MC met the titular character in the first chapter, so it's not like I had the characters twiddling their thumbs, but I'm beginning to realize the rest of this intro section will take a really, really long time. It's like a combination of starting fast and taking it slow and steady. In retrospect, that's probably why I like manga in general.