Yeah, don't panic yet. That's a lot of swarf, but if the screen hasn't been pulled before it may not be a problem. When I pulled my screen for the second oil change 1500 miles after the first one I did (12K miles when I bought the bike) I found more pieces of gasket material/sealer from the valve covers than I would have ever believed that I let drop into the motor. And a few pieces of metal that have me worrying about the oil galley plug in the crank backing out. After soliciting inputs here on the board, I'm just waiting for the next oil change to check the screen again before I panic about the metal stuff.
In other words, if the screen has been in there the whole time, there will be a lot of stuff on it. It catches everything. Watch it for consistent evidence of ongoing damage over more than one oil change.