Hi @Teekay,
That's correct, but there's a little more to it than that. You must only compare to prints from a reputable pro lab, whom you can trust has calibrated THEIR equipment to the "world standard" that your correspondent mentioned. Yes, there is a world standard.
If you calibrated to get a match to prints from a cheap lab in your local shopping centre (or even worse, a home printer), you're likely to be in trouble, you see? It's difficult to trust the cheaper labs, and impossible to trust home printers.
As you probably know, even the very good labs print a tiny bit differently from each other. The "world standard" is genuinely hard to comply with. But they do their best.
When you're calibrating and comparing, remember that your room light plays a heck of an important role.
They are reckless. They definitely should be checking against prints to confirm their calibration.
This might not be a calibration problem. It's more likely that she is editing in the wrong colour space. If she's editing in Adobe RGB, or even worse in ProPhoto RGB, this can happen. Do you know, or can you find out?
However, it could also be a viewing problem at your end. Which web browser do you use?