Stiff steam knob on Pop Up

Hi, I just purchased a new Pop Up. The steam handle is fairly stiff to turn, although still moves freely with enough force. I tried the handles of three display models and two were identical, while the third was quite loose and the display staff stated it should be stiff when new and loosen up a bit over time. This is my first machine so not sure what to expect.

Has anyone had a similar experience when new? I wonder if this is adjustable.