I think the issue lies in complacency, though. Sure, right now some people are fine with lag here and there. If that's the case, I really feel like they should not come for those who are complaining and pointing out that lag exists. If you're fine, you're doing fine. No need to comment I don't think. Why? Because all complaining can do is improve the product, especially on an issue like speed. Why would someone attempt to silence or disprove somebody pointing out a clear flaw? As I said, all this complaining can possibly do is make the end product better for everyone.
Thats how I see it, anyway. Apple fanboys make the company worse, because they cannot admit when the company makes a mistake, and constantly make excuses for the company. Let's put this in perspective. Apple is a tech company whose number one priority is PROFIT, which is fine. However some people act as if Apple are some sort of charity who make products out of the kindness of their hearts, as if they hand them to us asking for nothing in return. Apple charge A LOT for their products, and the consumer should expect great service in return. If the consumer does not receive great service, they have a right to complain without being shutdown. People become way, way WAY to attached to a company where they feel personally offended if a product of the company is scrutinised.
I'll say it again: iOS 9 is laggy. Whether you do or do not experience it, notice it, or care about it, it exists. Absolutely point period blank. End of conversation. And Apple need to fix it.