I think that the wipers are evenly or closely set to the hood and windsheild were it doesn't cause a problem restriction with wind effect. It doesn't really come in direct contact with the wind and coming back down with the aid of the wiper motor plus being designed that way, the motor won't have problems or slow downs when using it.

I was just thinking though that if the rear wiper on the crx and the slanted window and its park postion being horizontal it would cause problems and put strain on the rear wiper motor going up.Also driving with increased wind speeds with the park postion horizontal. Just cause its not designed that way, the motor will problably wear out alot faster then what a motor with a wiper sitting horizontal putting strain on the motor going up with the wind force from driving in excess speeds. Also probably be a noise from the wiper. And with the window slanted increases the force of the wind. And don't forget even though I already said this, the factory setting the wiper only goes about 3/4 of the way down were its not directly hitting resistence of the wind.

This is just my theroy.