Hahaha, but this girl lives in Alabama! I used to live there and I would say yes, it is possible. 
Actually if my friend had told me herself I doubt if I would've believed it, her mom told me though- so I figured it was probably credible. But again, they were Alabamians, and you really never know if they're taking you for a ride or not. (want to hear some funny stories? Just ask- living in the South was interesting, lol)
That explains it!
I can't get my thumb and 5th finger in a straight line- when I stretch as far as I can, they are still slightly V-shaped if you know what I mean. I figured that was because of the webbing. How do you get your hand to stretch that far? Also, how do you get the 2nd, 3rd, and 4th fingers to stretch further from eachother?
Thanks!
The same way porcupines make love: Carefully, very carefully!
This is a tricky subject to explain in writing, and you are far better off under the personal supervision of someone who knows about this stuff.
I will give you a few pointers:
1. You must differentiate between dynamic, static and passive flexibility: they are all different, their training is different and the end results are different. As pianists we rarely need passive flexibility, we
never need static flexibility and we definitely need dynamic flexibility.
2. You want to acquire flexibility by stretching and elongating muscle,
never tendons or ligaments.
3. Never rush flexibility training: you want to do it slowly gradually and carefully. In yoga it takes 5 – 10 years to fully stretch, not 5 – 10 weeks. Injuries in this area are amongst the worse (another reason I feel reluctant to suggest actual exercises here).
4. There is no need for extremes of flexibility in piano playing; in fact most people are already flexible enough in the hands/fingers to tackle most repertory without any need for additional flexibility training. Think about it: How many pieces do you play actually have extensive passages in tenths? Most likely you will be dealing with octaves, and most likely you can manage those even without your thumb and little finger being in a straight line (unless your hands are diminutive). Accurate hand displacement is usually what is needed not hand span.
5. There are a number of books that have “gymnastic” exercises for the fingers away from the piano (Note: flexibility is to be acquired away from the piano, not at the piano by trying to reach tenths and the like). Try:
Seymour Fink – Mastering piano technique (Amadeus) – make sure you get the video where he demonstrates the exercises, since it is really easy to do them wrong.
Thomas Fielden – The science of pianoforte technique (MacMillan).
Madeline Bruser – The art of practising (Bell Tower) also has a chapter on stretching – but for the whole body. I encourage you to take up yoga classes.
I hope this helps.
Best wishes,
Bernhard.
Topic: Average Reach?