It is a common and significant misconception that D-Wave is an "adiabatic quantum computer". Adiabatic quantum computers for instance would be able to factor numbers in polynomial time (or more generally, adiabatic quantum computers have the full power of quantum computation, i.e. they efficiently solve problems in the BQP class). D-Wave, while being an interesting computing machine, is definitely not a general quantum computer (not even they claim that anymore). Moreover, classical computers have proven to be better at the optimization problems D-Wave was specifically designed for.