Agreed - and in my day job, too, where my boss needs to present an experience that will have the highest chance of converting customers with a limited resource

Agreed - and in my day job, too, where my boss needs to present an experience that will have the highest chance of converting customers with a limited resource (my time) it doesn't make sense to spend 4x as long to make it play on IE6 when the return on that investment simply won't materialize.