Glad to be of assistance. Good training is definitely a must-have for the Mitsi, but it's not (IMHO) the death-trap people make it out to be. I trained with a guy who had under 2000 hours and came out of an Aztec and he's still flying them single pilot a few years later...hasn't even scratched the paint (granted he was a freight dog prior, and had the necessary weather/decision making/PIC skills).
I
will quibble with you about the relative performance of a B100...I don't know what the books say, but in my experience, even a ratted out old J or L model will crawl past a 100, and a dirty, cargo-hatched Marquise will blow the doors off of one. A cargo Marquise vs. a clean, late model, exec type B200 is a toss-up, with maybe a slight edge to the Mitsi if the engines aren't due for overhaul (which they probably are).
To be fair, my experience with the KA series was for a company which (through no fault of their own) had to contract the maintenance out (due to distance from HQ), and that maintenance may have been lacking. Whereas the company I flew the Mitsi for is owned by the same gentleman who owns one of the very few remaining world-class Mitsi specialist shops (edit: The Tusla based company mentioned in the article linked below), so I always knew that the guys turning the wrenches were experts on the aircraft...this likely changed my experiences to a significant degree.
Here's a highly favorable article (on the Mitsubishi's site, surprise), but it gels with my experience:
http://www.mu-2aircraft.com/upload/news/MU2News_73.pdf
But this article is pretty much the final word, AFAIC, gives both sides, such as they are.
Mitsubishi MU-2 Part 2 (What''s Wrong With the MU-2?) - Windows Live
PS. I will argue that not ALL check haulers have bad training...I learned from a guy I'd rather fly with in a kite than most pilots in an armor plated King Air.
This isn't to say that those who don't like the plane are incapable or stupid...con-pilot has a lot more time than I do. I suspect that his experiences were a product of a certain time, place, and standard of maintenance, but there are two sides to every story...Take it for what it's worth, etc etc.