Where does the rain go when you stand under a tree?

What happens to the rain water when you stand under a tree? As I stood under a tree waiting for my bus today, I was struck by the fact that I stayed nearly dry without an umbrella, yet people standing a nearby out in the open endured a steady stream of rain that I could see dripping from their umbrellas.

Occasionally a larger drop of water would fall from the tree, but since in 30 minutes I only got hit by a few drops, I stayed much drier than I would have if I were out in the rain. If the leaves were just consolidating small raindrops into larger drops, I would have expected to get just about as wet under the tree as outside the tree.

The trunk of the tree was relatively dry so I don't think the water is somehow making its way down the trunk.

I didn't notice a lot of water drops dripping from the circumference of the tree so it doesn't appear that the leaves force water to the edge of the tree. Though I'll admit that I didn't stand under the edge of the tree to confirm this. This seems like the most likely explanation, but visual inspection didn't confirm it. The tree was around 40 feet in diameter so you'd think if that much rain was being pushed to the edge of the tree there'd be a steady stream of drips near the edge of the treecover, much as there is from a house roof. And indeed, I could see a steady stream of drips coming from the nearby bus shelter with a 12 ft x 4 ft roof - it was clear that anyone standing under the edge of that roof would quickly be soaked.

So, where does the water from the tree go?