Perhaps, but if you google, you'll find this as a common theme on consumer websites:
"All the reviewers and experts we found agree that professional teeth whitening -- though expensive -- is the most effective and convenient way to brighten your smile. The ADA recommends these methods as well, saying it's preferable to have your tooth-whitening process supervised by a dentist"
Toothpaste whiteners=ripoff
Professionally whitened=best bang for buck.