Whizbang Dustyboots
Gnometown Hero
I think part of the problem in this thread is that people are saying "D&D" instead of "3E" or "4E," and are assuming everyone's on the same page they're on.That's a fallacious argument... Certainly any given DM, with enough effort, can do what ever like with any game. That's not what I talking about. I'm talking about what the game is designed to do.
The rules of 4E, for example, have very explicit guidelines on what kinds of encounters a character of a particular can handle and how powerful that encounter should be. There is a chart that lays out the DCs of "easy", "moderate" and "hard" skill checks at each level. The same goes for monster defenses and attacks at each level. PCs are expected to have attacks and defenses and damage and skills at a certain typical value in order to be able to meet those encounter with the proper amount of challenge.
Also, take a look at the options available... You won't find a Shopkeep class. You won't find a Gourmand paragon path. You won't find a Watercolor Expertise feat. All of the occupation and hobby based skills are gone. The majority of the rules based around a wargame-style, tactical squad combat system.
An ambitious DM can modify D&D to suit a low-powered unlikely-heroes-rising-up-from-the-gutter sort of game, but that's not what the game what built for.
Some of the Grand Truths everyone is tossing around are edition-specific and do not carry over.