>But realistically? For anything except code golf and nerd fights, the actual client requirement is probably better met by a WordPress widget written in php/html, because what they asked for is something that'll print the fizz buzz all the way up to the person's age when they log into the company website... Nobody is even going to notice if it takes a whole second to fizz buzz all the way to 95 :-)

What if 100 million people log from different corners of the world? Would the WordPress widget still cut it?