I can't comment for 1.10/1.11, since I just upgraded, but I have a personal (unproven, likely to be just superstition) theory for this kind of thing.
Since you brought it up, I would like to elaborate:
I did most of my life's MFing in 1.09, so that's where I get me ideas (hunches) from.
My experience leads me to believe this:
Probability of item types not only depends on the known MF formulas, but also on Character !
I began serious MFing once I upgraded to 1.09 from 1.07. The first Character to do her duty was my MFing Sorc (Orb/Hydra). She did mostly Mephisto.
I was getting bored at evading his attacks so I converted a Polebarb by switching heavy MF gear on him and suddenly I saw different items more frequently.
Next I went to see good old Baal on a habitual basis with the Barb, later with a LF Zon (Mowed down the Throne room friends faster)
My feeling is this:
Sorcs find more of: Bows and Helmets/Gloves
Barbs get more: Throwing Weapons, Armours, Boots
Zons net more: Maces/Hammers, Belts
Melee Chars are more suitable to find Sorceress Orbs
This may be totally due to randomness of MF work in the first place, but I sure feel that this is the way it is. The reason why I came to think of this is that my Sorc never found some of the elite Armours, even doing Hell Baal extensively, I never found a T-Gods Belt in a year with the Barb but the Zon found 6 in 3 month and the Barb is solely responsible for half of all my boots grail and a load of Lycander's Aims that the other 2 never found. Other item find results hint in the same direction and my Mules of certain periods definitely hint in the same direction, too.
I am aware, that this may all be noobish crap, but I personally strongly feel that it is related to the character type, an observation supported by many untwinked levelling finds. (My favvourite example: None of my Sorcs(and I play many) ever found a Vipermagi or Arcaine's, my Barbs do...
Does this make sense ? I have often thought it is down to mapseed, but I have sometimes switched maps (by changing difficulties) for my 3 main MFers and the tendencies persist.
Does anyone have a similar feeling, or is this just related to luck ?
(No idea about Pindle, I don't like running him, but it holds for Shenk/Eldritch whom I often smash before running Baal)
Probably this is all a load of crap, but I can't help feeling this way. Superstition is possibly another part of the Diablo fun...