Up here things rarely get plastered. Just usually plasterboard fitted (to battens) by the joiner, then a "taper" comes in and tapes and fills just the joints.
The typical "lack of care" that's rife in the building trade is the joiner doesn't cut the board right, hammers it into position because it;s too big, bursting the edge in the process then says "the taper will sort that"
the ones I dread are where a kitchen for example is being lined with wet wall as a backing rather than tiling. there's a LOT more scope for the joiner messing that up and getting the box holes in the wrong place or the wrong size.
Usually if it's just plain dry lined walls I don;t fit back boxes, just tape bundles of wires where they need to go, expect the joiner or whatever to drill a hole and leave them coming out of the plasterboard, and I will cut the back boxes in. they can't always get even that right, ranging from leaving the cables behind the board (where the F are they?) or drilling holes for each socket box at a completely random height so once you have fitted the boxes at the correct height you are left with a load of holes that need filling.
Of course we are the only ones in the trade aware of the building regs height limit for switches and sockets, nobody else knows that. (a bit like safe zones then)
