Not in the U.S. "Brilliant" to us means, very smart, or shining brightly, but we don't use it as the Brits do to mean great.

It means the same thing, although it is not used all that often. Most people I know also use it sarcastically.

In Canada, it's used to mean (1) shining, e.g., a brilliant light, (2) very clever or excellent, e.g., a brilliant idea, (3) it is often used as a sarcastic statement, e.g., Washing your white clothes with your coloured clothes is simply brilliant (i.e., stupid, ill-advised). The word is not often used verbally and not often used in normal, everyday writing.

In 2015 and still currently in 2021 the equivalent expression in American usage would have been (as now), “Awesome!”

Thank you very much.