Let's face it, some people want every game to be an RTS/action game and anything that detracts from that, like cutscenes, is bad in their opinion. This is why so many supposed RPGs have little to no story-line and extremely limited character development, these things detract from the action.
Because, as Suhira said, different people have different definitions of whether it's "too long", and because one person's opinion can change through time. What's fine the first time becomes "too long" on the third replay, or the third time you've died and it's played again.
Something which I hope they also avoid, by the way. If there's something next that means you need an autosave, the autosave should be after the cutscene, not before it.
I'm probably not being very clear with what I'm trying to say since I'm not 100% sure what points (of mine) you are responding to. I can be a bit cryptic at times, it's a personal flaw.