Celeste LeCompte praises it:
Slow riding means not arriving at work sweaty or worrying about wearing specific bike-riding shoes or any of the other wardrobe-related concerns that plague would-be commuters. Being a Slow Bike Rider may mean being left behind by the pack of spandex-wearing cyclists in the mornings, but it also means getting to know more about the rest of your community.
Felix Salmon believes it could help democratize riding:
As a general rule, the propensity of non-bicyclists to give biking a try is inversely proportional to the average velocity of the bikers they see on the street. If you live in a city where women in wedge heels are steering their old steel bikes around their daily errand route, there’s really nothing intimidating or scary about the prospect of getting on a bike yourself. If it’s all hipsters on fixies, by contrast, that just makes biking feel all the more alien and stupid.