Have to agree with Hudson and 80/20. It's amazing how many operators, especially new to type, want to mess about with tried and tested Boeing operating techniques.
The other good reason for the "thrust, speedbrake, reverse" order of doing things is that in the unlikely (but still allowable) event of dispatch with two inop reversers, crews will not be trying to move two wirelocked reverse thrust levers when they should be deployng the speedbrake.
