If speed is paramount each has their particular advantages depending on conditions. Plow can be very fast for relatively small accumulations if there are no snow walls and you can throw the snow to the side on a single pass. Plows are also faster in slush conditions than a blower. If there is moderate to significant snow walls however, in my experience, a blower is faster. Plowed snow in those conditions just falls back into the lane so extra time and care is required to push everything "back" and which point a blower is likely the faster tool.
Regardless of the time involved blowers produced a nice clean finished product that many homeowners appreciate, and don't leave hoards of gravel all over the lawn in the spring. A plow can get down to the gravel/concrete or pavement easily with each snowfall and leaves less of an ice buildup as the winter progresses.
If you get into a situations of 4 foot plus accumulations as the winter progresses a sub-compact with a blower can do much quicker than what the otherwise "heavy equipment" plows or loaders would otherwise be required for the job.
I just read MosRoad's post and feel compelled to state that I'm referring to suburban to semi-rural type driveways where space is typically limited. I agree that in relatively wide open spaces plows on trucks are king, get around tight garage home spaces however and they are not. Typical airport snow removal is considered heavy equipment, parking lot stuff still are usually one-tons with salt spreaders and for the most part are a bull in a china shop deal for most residential situations.
I often have people call me in to clean up the mess the plow guys leave.
