There's no clear definition of "better", but:
- if you did a poll here, yes, a vast majority of users would vote for avast! 5, no matter what you bet
- as a programmer who knows the internals, I can certainly say that avast! 5 is better
- avast! 5 is used by more users than avast! 4.x
- the support guys have to solve way less problems they did with avast! 4
...
Anyway, this is really going nowhere, nothing said here can change what is going to happen, and it also can't change the fact that you'd disagree with that.
So, thread closed.