Mizunos Irons are great. I just got a set of Hot Metals and WOW. First time for me with Mizunos and I am sold on them. I went over the specs I ordered with a fine tooth comb and all is right on. Trouble with Mizuno like Wilson is great Irons and not so great Woods.
Another thing the article noted was that 5 of the top 7 finishers at Dunhill used Mizuno. Interesting to say the least.
I'm not a super fanboy of Mizuno, but they're pretty nice clubs and have a certain feel when you strike them that's pretty nice.
Nick Faldo on the other hand sounds like a fanboy of Mizuno, and I can see and have experienced first hand why.
Shaft is definitely an improvement, but what PING did in the LST head was to move tungsten weight forward hence moving the CoG forward as well. This makes for a slightly less forgiving head but one that drops the spin rate as much as 500rpm over the regular head.