I just read some where that the demo is only 1/5 of the first act. That means the game must be huge. If we say that act 1 is the shortest act because it's just in the learing curve then we are in for a real treat. the only thing that I find a bit wrong with the demo is that it doesn't reveal how large the gameworld is going to be. At the end of the <img src="/ubbthreads/images/graemlins/div.gif" alt="" /> demo you had that peek on how large the world was.
All I can say is: keep up the good work larian imps. (and crush sacred <img src="/ubbthreads/images/graemlins/evilgrin1.gif" alt="" />)
Edit: so lets do a little calculation.
4 acts: (don't know the exact numbers it is just a guess)
Act 1 +/- 15%
Act 2 +/- 35%
Act 3 +/- 35%
Act 4 +/- 15%
If the demo is 20% of act one then you have played +/- 3% of the game.
Now if it takes you 30 minutes to play the demo. that gives
30 min / 3% = 10 minutes per 1% game => that gives you then a total of 1000 minutes and thats 17 hours gameplay. Now must take in account that this was an easy demo so lets double the number of hours so we compensate for the difficult parts of the game. That gives you 34 hours gameplay and I still haven't added the subquests to it. <img src="/ubbthreads/images/graemlins/eek.gif" alt="" />
Man 34 hours and when you take in account the battlefields you come to one huge game.