I agree Richard. I've also found, different controllers seem to have different standards at times; especially towers. Here at Addison, they have a unique instruction to hold short of the runway before departure where one must repeat they will hold short with runway and N number. If one doesn't repeat all that, they will ask you to. Tower specifically says, Nxxxx, hold short of runway xxx: do not cross the hold short line. This was implemented after they had several hold short violations. Of course, it's non-standard phraseology.I departed another field Monday where I was to hold for clearance and Wilco was fine. Several other cases of which I'm aware. In some cases Wilco is not accepted by controllers even though a published term.
Interesting conversation passing Atlanta.
Controller: airline xxx cross Dirty at 10,000 maintain 300 or better to Dirty.
RJ: cross Dirty at 10,000 unable on the speed; we can only do 310!
Controller repeats the same instruction emphasizing 300 or better.
RJ: repeats unable on the speed (g).
Controller says 310 is better than 300
RJ:says it will do 310.
Best,
Dave