While I do not consider general survivability higher than in older editions, there are several things to consider:
- You don´t have to play safe as DM: you may attack the wizard if the fighter does not use his marks effectively (In older editions the gentlemen agreement was attacking the fighter if the wizard stayed at the back rank).
- You recover better from a hard fight. (Without the use of magic items, but on the other hand, magic items can´t increase recovery a lot in 4e)
- One hit kills are impossible (Even crits don´t kill). But not beeing hit is also less likely.
4e combats are a little bit easier to predict. With above assumptions, you know that fighting 1vs1 will not kill you in a single round, but on the other hand, you can be sure, that 4 orcs kann wear down a fighter fast. In older editions, each orc maybe had a 1 of 20 chance to hit, but a single hit could take the fighter out... so it was more of a gamble.
But in a way I agree with the opener:
1st level characters already feel very heroic. I also liked it, when you have 2 or 3 levels before that as an option.
Those phase, which can be skipped would be a perfect tutorial especially for new players: a first level 4e character is already very complex.
Just having race and class features and no powers (or few at will powers) would be sufficient to learn the game and still have fun.