I would think the dithering algorithms might make all this theory about resampling effects rather moot.
In actual practice, it appears to me that the recent Photoshop resizing systems incorporate some type of sharpening if you have the resampling mode in the "automatic" setting. Then again, I find that at least my Sony cameras appear to do some processing even of the raw files that has the effect of (over) sharpening at some edges.
I guess where I'm going with this is that every stage we go through has an impact on the image that introduces artifacts that may be hard to control. In practice and relative to the entire process, those introduced by resampling at the printing stage by the driver seem to be rather inconsequential.
Paul