Some of this is not surprising, but some bits of it like the Yakuza having in depth knowlege of TWO versions of the game to talk about what was cut seem a bit odd.
That said, their comments seem to be spot on about some things, especially the behavior of the protaganist in games like this in general. As has been pointed out before, a realistic game about being a high end organized crime member would probably not involve a lot of fun action, but be more along the lines of an accounting simulation.
In general the thing about the big guys is being able to prove that they actually did anything even if people "know" what they are up to. That seems to be pretty much universal to all civilized nations with strong codes of laws and effective enforcement. A "boss" type once in that role is going to have other people do things for him, and keep himself as seperated from the actual "action" as possible so it can't be tied to him. The old maxim "A supervisors job is not to do the work of ten men, but to get ten men to do their work", that applies to pretty much anything where there are managers, bosses, or whatever, criminal or legitimate. If some boss runs around breaking legs and being a menace, he's taking a lot of risks of being caught doing something. The guy is a not anywhere near as useful if he's in jail on assault charges or whatever. Rather he sends punks out to do that kind of thing, and then cuts them loose if they mess up and get caught, those who succeed and remain free and relatively unknown are the kinds of guys who are going to advance.
Of course in the scope of a TV show or video game, people want to see all aspects of this. Both the fear, respect, and power of the upper echelons, along with the juicy action and "hands on" cruelty... all coming from the same person which is implausible.
Truthfully I think the common "Hollywood" image of what Organized Crime is, comes from periods where things were civilized, but laws were hard to enforce. In the US for example we went through a period where the toughest guys were the bosses, and could pretty much do what they wanted with relative imputiny. This was because law enforcement was weak and unorganized. Guys like Al Capone literally took over entire cities, and while people frequently lionize the IRS for being the ones who found the evidence to arrest him, that wasn't the issue so much as nobody being able to do it for a long time. People like J. Edgar Hoover are considered villains today because of some of the policies they put into force, but when things were bad, they and those policies were quite heroic because they turned groups like the FBI into an effective force that was finally able to go after the "Bonnie and Clydes" that were out there.
People might intellecutally realize the truth where reminders are good, but emotionally they think of the things songs like this one were written about (one of my favorites actually).
http://www.youtube.com/watch?v=3Euavz2DQ5k
I guess the point is that whether they are Yakuza or not, the points seem to be good, and I think a reminder like that is a good thing from time to time.