Thank you for your message.

I would respond by saying, "It feels normal to me but your opinion may differ."

This is the whole point.  What I consider normal may not be within YOUR parameter of normal.  Unless there's a published specification for eech lens, giving the minimum and maximum torque forces that is considered to be within manufacturerer's tolerance and I actulally measre it, it's all subjective.

As I mentioned above some people like it a bit tight, some prefer it a bit loose.