They are, more or less, clear that they aren't doing real, general purpose quantum computing but special purpose quantum computing.
It would be great to have a general purpose quantum computer. D-Wave is spec'd as such, sorry.
It's possible that D-Wave is a clever special-purpose classical machine that's just being hyped as a quantum machine. But the linked article seems to give good evidence that D-Wave is what it claims to be; a special purpose quantum computer, which is indeed different than a general purpose quantum computer.
One thing to think about is that D-Wave may be going just a little beyond what's possible but, apparently, using quantum computing to go that little, they learning something possible interesting about creating a quantum computing device.