Interesting and impressive, but that is definitely not the case for everyone. I have been active on Steemit for a couple months, and I am just now at 43. I am sure it depends on the topics of your posts, and the communities that you engage in, but I think my slow growth experience is closer to average.
It's also worth noting that @kpine's reputation was in the 40s when he first posted this, so it really does depend.