I believe all of this is in the first and/or third post, but here goes:
So the Deminars are the $15 demos by famous/disney chefs? And these are still not listed as of yet, correct? I was under the assumption that everything related to the F&W extra events had to be booked on the phone. Online booking would be easier for me but I'm guessing the French Family Meal event and the Regional Italian wine pairing would have to be booked via phone?
Deminar schedules have not yet been released.
The ONLY events that have been available for online booking have been: The Festival Center deminars (culinary, beverage and mixology), Party for the Senses (general admission only) and usually the large events taking place in the World Showplace (this year the only candidate is the Burger Block Party) but ONLY general admission. (It is not confirmed that Burger Block Party will be offered online but it seems likely)
If you want PFTS Wine View Lounge or Reserved Seating, you must book by phone.
If you want Burger Block Party VIP Nosh Pit or Reserved Seating, you must book by phone.
Deminars are available by phone only 7/24 through 7/29 for Tables in Wonderland members/Annual Passholders/Disney Vacation Club members. You must have your annual pass, DVC member number or TIW member number when you call. Starting 7/30 they will be available for booking online, and for booking by the general public.
If you are not a TIW/DVC/AP member and you want any event other than PFTS General Admission, Burger Block Party General Admission (anticipated) or deminars you will need to book by phone starting on 7/30.
Summary:
July 24: Deminars only, TIW/DVC/AP members, phone only
July 29: Possibly Disney Visa prebooking. Limited availability all events, might exclude deminars and small capacity events, phone only, must have a Chase Disney Visa to book (still unannounced for 2015)
July 30: General public booking. Deminars, PFTS General Admission and (anticipated) Burger Block Party General Admission available online. All other events by phone only.
Am I understanding correctly that PFTS Reserved Seating will not be available for advanced booking for AP/DVC/TIW?
Yes. Only the deminars will be available 7/24 for AP/DVC/TIW (unless there is another error). If I remember last year's error correctly some said they were able to book Party for the Senses early in this fashion but not many did this. It's possible it was caught and stopped.
Also, you mentioned limited availability for Disney Visa cardholders to book a day early. Is this available for this year and would it be the 23rd or 29th?
It has not been announced for this year yet. If it does happen, it will be the 29th. By phone only, limited availability. I don't believe this includes deminars or events with a very small capacity (maybe under 20 persons).
Is it possible that the CM's at 407 WDW-FEST have zero information on any of these special events?
WDW-FEST is the same phone line as WDW-DINE. All it is really good for is booking reservations. They will not have any information that you do not already have.