@atomicpoet
As I gather you found out in the thread :) this doesn't apply to WordPress blogs living on WordPress dot com in any of the non-professional payment tiers.
I don't know what fraction of that 44% of websites are in that category, but I bet it's the majority, just because that's the thing that's easiest to do.
Maybe WP will introduce that as available to everyone, or at least to everyone paying at least the like $5 ad-free fee...