These are a few things I have heard and or experienced.
Because of the amount of silt washed down after the dam was removed a lot of bug habitat was covered. The last two years there has not been the insect the activity that there has been in the past.
The very high water of the last two years has helped wash out the silt a lot but some feel that a couple more years of high water would have helped.
The silt may have affected fish production also.
I read before the removal that some bioligists thought that it would adversly affect fishing for five years and then it would begin to improve dramatically.
I would like to hear ZEN chime in here and get his opinion.
Blessings
jesse