In BtS, that's SIX out of FORTY-EIGHT leaders in the game. There are many more ancient leaders than modern ones in the game.
6 out of 48 is 1/8 of all the leaders. Considering that the leaders in Civ span a range of about 40 centuries, having 1/8 of the leaders all in one century is very disproportionate. Besides, having modern leaders seems weird... It's much harder to objectively obsess how influential they were on their civilization's development.