Joined: Jul 2007
Posts: 8,603
Likes: 3,532
From: South shore, L.I., NY
Bikes: Trek Emonda SL7, Cannondale Topstone, Miyata City Liner, Specialized Chisel, Specialized Epic Evo
The dropouts are typically not carbon, usually aluminum.
The best advice I have seen and what I follow, is with the QR lever parallel to the ground, the nut should be tight. Then tighten the lever.
Note that if it's a mt. bike with disc brakes, the front skewer needs to be extra tight and checked periodically. If it comes loose, the braking action can pop the F wheel out of the dropouts.