I'm quite happy with the idea that game length isn't everything - take the recently released Fahrenheit(/Indigo Prophecy) - took me 7 hours first time through, but absolute genius game and worth every penny of £25 I paid for it.

That said - I've already posted my thoughts on telltale's pricing policy (or lack of) elsewhere. Even if the size of episodes increases for the money, or the cost goes down after the first episode - this first episode is already alienating people... it was not a good idea to price the first ever release at a level that people start questioning its worth - at the very least, they needed a cheap introductory offer to get everyone playing.