I got AV 2 on my lap now, and the fluff entries for items - when they are there (pp. 56-81 especially) - are often more substantial than those in MME. Now it could be the case that MME features a higher number of such entires overall (I haven't checked), but the line I just quoted strikes me as misrepresentative as ever. There is no "new design paradigm".
Windjammer, I think the misrepresentation is suggesting that AV2 was anything like MME. It wasn't, and there is definitely a new attitude at WotC concerning creating useful background information and hooks. I'm not sure how you possibly missed that EVERY magic item in MME, including magical ammo, potions, alchemy items, and other consumables has a "fluff" paragraph or two introducing it - and in some cases, a sidebar comment from Mordenkainen. I'm not sure how, if you bought MME, you could have missed that comparing it to the AV2 in your lap, which only has a few sidebars scattered throughout the book, and many items have no origin information at all.
I think it fair to mention that you picked a random 20 pages of the book, so while we have a partial impression we are non the clearer on the overall reprint ratio of the book's content. However, as you nicely put it, the data help individual readers to decide for themselves whether 1 in 6 items being a reprint merits the MVRP or not. Thankfully, threads which document further instances of reprints exist on Enworld.
I can't help but notice you inferring that I selected a specific sampling of the MME's pages which was not representative of the whole. Since you seem very concerned about clarifying the overall reprint ratio, I took the time to complete a full accounting of MME's items:
Mundane Armor - 7 new, 0 reprints
Magic Armor – 17 new, 0 reprints
Mundane & Superior Weapons – 6 new, 16 reprints*
Magic Weapons – 26 new, 0 reprints
Magical Ammunition – 7 new, 0 reprints
Superior Implements – 37 reprints**
Magic Implements – 39 new, 0 reprints
Magic Arm slots – 11 new, 0 reprints
Magic Feet slots – 7 new, 0 reprints
Magic Hand slots - 5 new, 1 reprints
Magic Head Slots – 14 new, 4 reprints
Magic Neck Slots – 11 new, 5 reprints
Magic Rings – 6 new, 0 reprints
Magic Waist slots - 3 new, 4 reprints
Wondrous Items – 18 new, 15 reprints
Consumable Items – 22 new, 7 reprints
Other Consumable – 14 new, 0 reprints
Artifacts – 7 new, 0 reprints
Cursed Items – 15 new, 0 reprints
Adventuring Gear - 36 new, 6 reprints
Buildings – 14 new, 0 reprints
Trade Goods – 16 new, 1 reprint
Alchemy Items – 16 new, 4 reprints
*Some reprints were needed to change some weapon categories or add new properties (like Small)
** Some reprints added DDI only content (Dragon Magazine) items to an official supplement.
This gives a total of 317 new items and 100 reprints. Of the reprints, 60 are mundane weapons, adventuring gear, and superior weapons or implements, which took up around 5 pages in Mordenkainen's Magnificent Emporium. If you remove those 60 items from the tally, unless you really want to quibble over mundane items which covered a minuscule fraction of MME's pages, you have a ratio of 11% reprints out of a total of 357 items. So actually 1 in 6 was indeed an unfair sampling, when the total is more like 1 in 10.
I hope that this new data helps you and other D&D gamers to make the decision about buying your own copy of the MME or not, and to decide whether the information in MME is worth the added cost of a trip to the FLGS.