This topic comes up a lot, and the reviews here seem to be mixed. Some had amazing, fabulous experiences, and others (like me) were not terribly pleased.

Preschool success seems to have more to do with the specific school and teacher and whether they "get" your child and just how GT s/he is than with the method, Montessori or otherwise. Certainly the Montessori method is a valid one. Properly practiced and with the right teacher, it can be a good fit for an HG+ child. But like everything else, one size does not fit all.

You might search for "Montessori" here and check the old threads. There hasn't been one for a few months, but there are a number of them buried in there.

Kriston