TerraDave
5ever, or until 2024
The difference, of course, is that if players act like they're tough with first level PCs, they die. Period. Slash. Roll a new character.
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Unless they get their sleep spell off first.
You quoted the last part of my post, but not the first line: my players actually do discuss this stuff. Some times at annoying length. Low level play in 4E is closer to mid level in later editions...but otherwise I don't really agree with much in your post. The strategic considerations are there, and 4E, being almost a wargame after all rewards intelligent play as much as any past edition.
But, my point you did quote is that I have seen plenty of bold play in all editions. It is ultimitaly a DM decision about how much he brings the hammer down, or, gods forbid, fudges (see the other thread on that). And its up to the players to factor that in as they get ready to kick down the door; maybe the players like making new charecters.