Not really a question you can ask a in a poll. Most people will probably have it plugged in if they're sat at their desk or if it's low on power but can't give an exact percentage
Except in rare cases, the battery lasts me all day. I plug it in before bed, and occasionally read a bit, thus my vote. But really, I leave my charger at home when at work and play.
But im just wondering..What is the point of this question if you dont even own one yet?? I dont see how asking if you use your ipad while charging can influence you dession in buying?
The iPad needs 10w to "fully" charge - that's more than most USB ports provide.
If you have a new-ish computer (like in the last couple years) you iPad should charge - just slowly - when it's asleep. If the screen is on, however, it's not charging.