*PLEASE TAKE NOTE future macaron makers! You need a proper pastry scale if you want to make proper pastry. All the pros everywhere use them. The measurements in grams in the book are universal. Every pastry chef worth his/her salt has a scale to get the exact quantities correct. C'est comme ca. Making pastry is chemistry and not a casual handful of this or that.
Another thing Jill pointed out - is get to know your oven.An oven thermometer is the best way. Macarons can be fickle - much depends on your oven.
Another lecon. Jill does NOT use a Kitchen Aide to beat her egg whites.Simply a Moulinex hand-held electric whisk. So we can all get down and start making macarons, myself and BEAR included!