Is the City Too Ruthless to Attract Smart Women?

I recently found an article on www.hereisthecity.com written by a city insider who counters the charges that women aren't smart enough to make a career in the city with a stunning riposte that it it the hostile atmosphere and the 24/7 culture which puts women off, not the "high standards" for intelligence as some have speculated. The article Where are all the City Girls? explains:  "No evidence indicates that banking attracts the brightest people. The unspoken assumption is that society’s highest-paid individuals are the smartest, and thus, if the City is filled with men, men must be smarter, unless women have a good excuse for being absent. Naturally, banking - like all very well paid jobs - attracts highly intelligent people, but only the ones with certain personality traits. Those traits might be more common in men. Maybe girls simply don’t find the number-crunching, inside-trading, hostile-takeover games of investment banking as fascinating. In the same way that you never find any female dictators, perhaps females just don’t have the killer instincts it takes to bulldoze their way to a questionable sort of 'City success'. Surely, ruthlessness and mathematical talent are not necessarily correlated. So why should anyone be shocked to find that most mathematically-gifted people - including women - would flee from the idea of spending their waking life working amongst the City’s abrasive predators?"