I have a pair of Iquitos that are about 4 years old now. They are JUST starting to calm down for me. There's always an exception, but from what I've heard from others who have/do own them...that is about right. I got the female I have back in 2008 and she was a striker right out of the bag...the male I got in 2009 and he actually bit me THROUGH the bag! lol.