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The FAA and Transport Canada sponsor the holdover time testing of Type II and IV de-/anti-icing fluids and publish holdover time tables for each individual fluid, on an annual basis. These are known as brand name tables.
They also publish generic Type II and IV holdover time tables, where they publish the lowest (worst case) cells from each of the individual Type II or IV holdover time tables. This makes life simple in that only one table is required for each fluid Type. The AEA only publishes the generic tables and leaves it to the user to obtain brand name tables from the FAA or TC websites if required.
http://www.faa.gov/other_visit/aviat...ver_Tables.doc
Operators have to make a decision as whether to provide their flight crews with just the generic tables, the generic tables plus the brand name tables for the fluids used at their main bases, or less likely all the brand name tables.
The figures you quote are indeed from the generic Type II holdover time table as published by the FAA and TC and subsequently adopted by the AEA. However, if you look at the Ecowing 26 times under the same conditions (snow) you get:
-3 and above = 25-45 minutes
below -3 to -14 = 25-40 minutes
Operators who only publish the generic tables to their flightcrews would not therefore benefit from the additional time provided by this fluid.
The times you quote under fog conditions, i.e. 1:05-1:55 (hours:minutes) at -3 deg C and above, is from the Ecowing 26 brand name table (75/25), whereas the 0:25-1:00 cell is as you say from the generic Type II table adopted by the AEA.