It may seem heavily biased, this is based on test results I've had from experimenting. Just try out my benchmarking tool I just posted in the user contributions forum and see what kind of polygons per second and vertices per second rates you can get. 19 million polygons per second is what I get and someone else gets 22 million polygons per second. Blocks could be lucky to even make even 50,000 polygons per second, a tiny fraction.

"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip My 2D game - release on Jun 13th; My tutorials