Earning pots of money is one thing, but how do you know when you've really arrived in the high-rollers' club? Tulkinghorn is referring of course to status, something not easily measured by a scale as obtuse as the equity spread.
Partners at Charles Russell have pioneered a new system of measurement - how your BlackBerry meets its end.
Starting at the bottom is the lowly partner who had his flushed down the toilet. At the next rung is the poor chap who lost his BlackBerry out of the window of a moving taxi.
Moving up the scale are the two partners who had their buzzing email devices chucked into the hotel swimming pool from a high balcony.
But by far the most glamorous Charles Russell partner had his crushed under the heel of a red stiletto. By his mistress. Now that's proper class.