You should trust a calibrated display but not all displays are correctly calibrated! All those possible settings for backlight intensity, white point, they play a huge role. Which one is correct? The one that matches the print next to the display. And the same settings that produce that match with your Dell, will likely not
produce a match on my SpectraView using vastly different software and instrument. Even the same software product driven with two different instruments but set to the same calibration will likely produce different results.
This should clear up what you need to do to ensure YOUR display is properly calibrated: http://www.luminous-landscape.com/tu...too_dark.shtml
And if you want other's in your group to see what you see, they too need to use the same reference system ideally: same display, puck, settings, control over environmental conditions near the display and as important, print viewing conditions.