Smoke!!!

[Imp]

Was on a boat called Gloria Spear as in beer a few days back would that do. Big bar & even a fridge by the bed, in fact fridges everywhere never more than about 8 feet from a chilled one.
That do you.

Just did a test in MBT
2 Aus squads with TI behind a smoke screen who remained stationary.
A horde of advancing troops who moved to triger op fire for 4 turns.
The first 2 turns Aus Squads did nothing in their turn, the last 2 they Z fired all shots away.
The result
Every turn both squads opfired 6 times regardless which coincidentally is the number of shots they have as Exp was 80 or so.

Conclusion
As suspected they operate exactly the same regardless of whos turn it is. The only reason they might appear to opfire less if they fire is because doing so caused them to take fire & they carried some suppresion into the other players turn.