Currently I discovered that insight will always output dates in Eastern Standard Time no matter the user setup. It is how the system is configured to operate at the moment. I discovered a discrepancy in times between the form date and the date in insight. The date that the individuals filled the form was May1 but in insight it was showing April 30th date. This was due to insight having a fixed time zone set up.
It would be great to be able to control the time zone you want your reporting in to match the user setup or eloqua instance to keep things in better alignment.