To be fair, the MGS series has always had lengthy intros and long cutscenes breaking up the action. Is having to watch and not press buttons like a neurotic twitcher really that bad? Set down the controller. Go make a sandwich. Relax.
Y'know I think Kojima would be quite unhappy if you walked out and made a sandwich in the middle of his long, exposition rich and epic story...
And "breaking up the action" is fine as long as there's action to be broken up in the first place. MGS2 i'm looking at you.
I think MGS3 had the cutscene to gameplay ratio and overall pacing down though, Kojima apparently went back down the hour long cutscenes forever route for MGS4.
Thinking about it having ages and ages of cutscenes works for good Visual Novel type games. See Persona 4 for example, it's the only game i'll ever call perfect and the entire first 2/3 hours are conversation paths with save points dotted about.
Yet it never wastes my fucking time and keeps things interesting during that time period, which is where most people find the most fault to be in the MGS games. Too much shit we already know is repeated and explained ad nauseam.
So I believe that for most people it's not "I want to play my game!" It's more "Why won't something interesting happen?!"