No, not really. I'm paraphrasing and adding my own comments, but here's the poop:
According to John, there wasn't any attempt to "break-in" the cam at the engine plant since it only ran 30 seconds to a minute on the hot test fixture before being drained and shipped. In addition, there wasn't any attempt to "break-in" the cam at the final car assembly plant either. Each car only ran for a couple of minutes at idle after car-start on the Final Line, spent a minute or two on the roll test, and never ran again except for rail and/or haulaway truck loading and unloading. Let's face it, at 5000 engines a day, there just wasn't enough time to break them in, and it wasn't needed anyway.
The reason they didn't need to have a break-in period was because production (and service) camshaft lobes were Parkerized for improved initial surface oil retention. Hot-rod aftermarket cams without Parkerized lobes are VERY sensitive to initial break-in so they have to be run at approx 2500 RPM for around 20 minutes or so. Production cams depend on lobe Parkerizing (increasing the resistance to wear through the application of a chemical phosphate conversion coating) to avoid being "wiped".
Ed