In my experience, the reason you put Tyvek (or tar paper) behind the strapping/furring is to allow the siding to breathe. What advantage would the other way around give a building?
The only thing I can think of is that they are trying to create a dead air space for improved R-value in front of foil-faced polyiso insulation. I've seen ratings expressed for polyiso with the qualification that the rating is for an installation behind an air space.
If that is so, then I would think the small advantage of the air pocket is much outweighed by the value of good ventillation behind the siding. I'd certaily trade +R-1 for +5 years in the life expectency of CVG cedar siding.
