What's the buzz about Jeannine Manuel?

[bayesian]

Despite its reputation as a "top" French international school, its IB results are rather mediocre, averages of 37.5 and 35.0 in Paris and Lille campus, respectively.

Top UK IB schools have averages about 39-40. North London Collegiate averaged 41.

I know Jeannine Manuel also does the French bac on top of IB, but how can it be called academically top-tier when the results are 2nd tier?

I don't know either of the schools in questions personally, but it's probably down to how selective they are. That is usually what drives results!