I define genius as possessing an exceptional capacity for processing information, not necessarily the nature or extent of said information.
In that case, someone who is not a genius (e.g. average processing capacity) may be very likely to have an enriched state of mind and perception that a genius would not be capable of sober. In that case, you could say that outperforming a genius in any cognitive task would make that person comparable to the other in that respect. This is an exception due to direct chemical influence to the brain, though. It is not quite as simple as that either, I'm just meandering around my thoughts. I would be interested to hear what both would have to say if the high person reacts to bud in a performance-enhancing way (as opposed to the common effect of feeling stupid). This is all theoretical though.
But really, in short, the answer is no.