Yes, as described in the article, this is just dithering. I've never heard of "stochastic resonance", but from what I can discern from the wikipedia article, it's essentially the same thing except applied to systems that are merely "nonlinear" and "bistable", as opposed to outright quantized.

It appears we are not the first to note the connection: http://www.ncbi.nlm.nih.gov/pubmed/11046260