I haven't found a more comprehensive gallery of real-life True Summers than this one, on Elea Blake Cosmetic Studio's Facebook page.
Personal color systems other than the 12-tone system usually rely on hair and eye color to determine your color palette. These systems tend to incorrectly type light-eyed, fair-haired women as Summers, even when they're not. And they tend to to ignore the possibility that women with darker hair and eyes can be Summers.
A quick glance through Elea Blake's True Summer album will give you a snapshot of what True Summers really look like. It's a varied picture!
You'll see loads of brunettes. You'll see women with red hair, brown eyes, freckles, and other features that you don't think of when you think of True Summer. You'll see women of color who would surely be mistyped as Dark Autumn or Dark Winter in most other color systems.
A version of this post ran in July of 2011.