I think it is actually not *that* hard to get fast at BLD if you practice hard enough. I was actually inspired to get sub 30 when I saw how fast people like Riley, Maskow, Noah, porkynator, Gabriel Dechichi etc improved.
Plus I think there is way more information about BLD nowadays, about stuff like 3 style. It was probably easier for me to improve at BLD than say, Haiyan or Aronpm.