No its not. If for no other reason than that outlined in by the OP.
Depending on the characters, the game and the players, I would consider one of the following:
1. Give the 30 point guy 7 points to spend on his characters stats. This will reduce the spread to 8 points, but doesn't take away from the other players good rolls.
2. Give the 30 point guy an extra level.
3. Play through to an appropriate stopping point then offer the players to rework their characters, create a new one etc based on what you have learnt so far.
thotd
I'd go with option 1 to help out the 30 point player. Reduces the differences, but the other players can keep their good rolls. You can sell it to the good rolling players saying that the other player won't be as much of an albatross anymore. Is the PHB going to be that different in terms of character creation?