yes, i also had a gall bladder surgery a few years back, and ever since, my digestion has definitely gone down than before.
while the gall bladder does not really have that much of a role in digestion, it is true that removing it will slow down your digestion.
once your gall bladder is removed, you should make sure to eat foods that are easily digested, and also have small meals instead of big ones.
http://www.everydayhealth.com/gallbladder/digestive-problems-after-gallbladder-surgery.aspx