The notes are actually shorter in duration, actual time. Whole, half, and quarter notes make people think of equal durations, and 8th note triplets is admittingly confusing and doesn't make sense at first. The terminology takes some getting used to, so don't get discouraged.
8th note triplets are often counted:
one-trip-let,two-trip-let,three-trip-let,four-trip-let
this site has some neat examples:
http://www.billrotelladrumbeatings.com/triplet.htm
Triplets sound cool in many situations. It's just different. Not better or worse, but different. I wish I had a sound sample but I'm not at my music PC...