The article actually addresses the issue, saying that " observations have shown that essentially all “primitive” cognitive abilities—short and long term memory,

The article actually addresses the issue, saying that " observations have shown that essentially all “primitive” cognitive abilities—short and long term memory, the use of language, the use of quantities and numbers, the visualization of geometric relationships, pattern recognition, and so on—are positively correlated." So, in a nutshell : on average, being super smart at math means you are probably verbally smart too.