I made this poll to try to informally discover how long people think, in an ideal world, combat in 4th edition should last when measured in rounds. The poll assumes a typical, well-rounded party of five adventurers squaring off against five standard monsters of their level, in an encounter area with appropriate terrain. The goal of the combat is that the monsters are trying to kill the PCs and the PCs would only flee if the situation appears utterly hopeless.
Please note this poll is asking for how long combat should be, not how long combat actually lasts in your games. The poll will be open until June 10.
I've also created a discussion thread in the forums, to discuss this matter.