Normally when one makes a mag change, you shift the pistol in your hand so that your strong hand thumb can push the mag release. Champion shooter Athena Lee, by contrast, maintains her grip of the pistol with her strong hand and uses her weak hand thumb to push the mag release.
In the video below produced by Armscor, she notes that she has smaller hands. After viewing the video, I’d have to say her method of mag changes seems just as fast as the traditional method. I may have to give it a try as I, too, have smaller hands.