If you have the original pipes, you might notice that the bike is slightly quieter, as the reed valves in the control unit make a very soft clicking sound.
Very few dealers will say anything about AI removal affecting the warrantee. If yours does, find another dealer because you can't trust them.
There will be no performance or fuel consumption differences, at least not now. Maybe in 60K miles or so, your bike might perform better that it would have because the exhaust valves will likely be in better condition.
The exhaust system will run cooler and pop less. As long as your typical ride is long enough to heat the pipes enough to drive off condensation, this will make the entire exhaist system last longer and will help reduce discolouration of the finish.
