There was a recent article here on HN that seemed to debunk the d-wave machines, that showed that a classic (non-quantum) algorithm was probably the best candidate for the results the d-wave produces.
In light of that, true quantum computing may be farther off than you're expecting.
You mean the paper that has been countered with [1]? Regarding this I'd wait and see what the reaction to the counter is going to be, I for one am certainly not convinced that modeling one particular implementation classically would disprove quantum computing for any of the implementations. As far as I've read we have enough examples where only quantum models fit, which all would have to be debunked.
In light of that, true quantum computing may be farther off than you're expecting.