Didn't think that happened in the rw? I had both CAA and FAA controllers on the beta team at one point and it was never mentioned.
I can say that we do use that format on VATSIM but I have never considered the difference significant. The PF3 clearance omits 'as filed' for the route, and transposes the order for frequency and transponder.
With no SID, PF3's current clearance:
'Execjet 732 cleared to KSGF runway heading departure maintain 15 thousand expect flight level 300 ten minutes after departure. Squawk 3263 Departure frequency 119.35 '
and standard format would be:
'Execjet 732 cleared to KSGF as filed, maintain 15 thousand expect flight level 300 ten minutes after departure. Departure frequency 119.35, Squawk 3263.'
With a SID, PF3's clearance:
'World 732 cleared to KMIA departure via Tango Echo Sierra Tango cleared to 9 thousand Squawk 4324 Departure 123.6 '
and standard format would be:
'World 732 cleared to KMIA via Tango Echo Sierra Tango departure then as filed, cleared to 9 thousand. Departure 123.6, Squawk 4324.'
As you say, none of the RW pilots or controllers on the team mentioned it.