I actually think that's a great endorsement of Kenyan education. I don't deal with English-speaking African countries that often (I'm Portuguese, so naturally we have ties to other bits of the continent), but I've often been impressed by how well they communicate regardless of the profession they're in--I don't mean that as a bias, but rather as it befitting the kind of conversation you'd have with an English major in the UK (to which I have a lot of exposure).

Perhaps the US-centric "optimization" of English is to blame here, since it is so obvious in regular US media we all consume across the planet, and is likely the contrasting style.