it's not even just that there's isn't a lot of good bowlers now as if that could be connected to a weak era. There is 10 test teams, given a 4 bowler per team typical selection that leaves 40 spots for international bowlers the world over. Given that in that lot there are going to be a few poor players, especially in the weaker teams it's not that unbelievable that someone could push their way into the bottom end of that set with one good series.
He's 37th, but the players round him are philander (recent debutee), hauritz (dropped), benn (dropped, a few mainly batting all-rounders and some guys who are in and out of their teams.
rankings are comparative, and I'd say he weighs up ok against his peers even with only 1 series under his belt. perhaps try listig 40 better bowlers than him and we'll see.
perhaps the arguement should be if there's really any need for a top 100 when it will mean many dropped and part time bowlers are needed to make up the numbers in the list.