Here we go..
http://www.auckland.ac.nz/uoa/about/.../survey_05.cfm
Summary...
Most people will switch from Westpac and ANZ banks
Least - Kiwibank and TSB
Most satisfied people are with KIwibank and TSB
Least - Westpac and ANZ.
Guess who have the most excessive fees? Yup, Westpac and BNZ and ANZ
Least - TSB and Kiwibank
People love to hate westpac :)
Hope this helps