Ease of counting numerals doesn't necessarily translate to overall mathematical ability. French and Russian have fairly complicated numerals, but many of the world's best mathematicians also happen to be French and Russian speaking... and of course, English speaking.
At the higher levels of mathematics, abstract thinking becomes more important than arithmetic. It's not obvious to me that facility at arithmetic is necessarily advantageous then. In fact, I wonder if highly inflected languages (Latin-derived) or those with complex grammars (Hungarian, Slavic) train the brain to work with symbols more efficiently.
Than English...that article is complete bullshit, the Inuits have 30 different words for snow = more information density, but is it usable for every culture?