2 girls both completed the Ib in the uk.... One is now a surgeon and the other a barrister... Courtesy of Cambridge and Ucl.... Fillion is correct in as much as Some public schools resist the qualification and also correct as subjects are not so rigorously specialised...but it has been "en vogue" for quite some time circa 20 yrs ! My daughters are in their mid 30's .... Don,t underestimate the qualification but choose the school carefully ... In the end only one school is taken seriously for the sort of university that Fillion has in mind ,that is DC.. Unfair but it has a little history and stuffy uni admin people admire that. Think Ek HR ! And I always enjoy the thought that Warren Buffet, Bill Gates, Richard Branson etc .were drop outs... The child's happiness is key.
Good luck !