I don't buy that. When I was there first week of February US closed @ 6pm and IOA closed at 7pm. I was just looking at the March and April calendar and there are plenty of nights where IOA is open til 9, 10 and even 11! That includes some weekday. I just don't think with the amount of tax revenue Universal brings to Orlando, that they are forced to close due to noise ordinances. That is obviously just my opinion.
I think the real reason is to cut costs. It was slow when I was there in February, we got there right at opening and rode everything we wanted by 6, even had time to go back and do Forbidden Journey again. Universal knows this and they can cut park hours and costs without park goers missing anything. They extend hours during busy periods to let the crowds get more rides in.
I think its heinous. $125 and you are done by 7pm. I will keep going. but I don't have to like it!!!