Mild cam? Yes if you consider the factory Cobra Jet cam a mild cam. Part of that has to do with perspective. In the 1970s and 1980s the factory cam wasn't all that mild. Lobe design AND valve springs back then didn't offer the options we have today. By today's standards yes its pretty mild.
The cam is just one step short of doing anything "bad" to the engine's power band. Its a good design for a street cam, considering it was probably designed in the late1970s. Not too many people could afford a "weekend car" back then. People drove their performance cars to work (in traffic, in bad weather, etc). In 1977 some Cleveland equipped cars were still under factory warranty! And in California they had to pass a smog inspection.
The biggest difference between this cam and the factory Cobra Jet cam are the lobe centers; 117° (factory cam) verses 112°. This cam was intended to make a few more horsepower due to the advanced intake valve events. And it was intended to invigorate the feel of the engine via increasing the dynamic compression and making the torque curve less flat, I would expect the torque curve to have a gentle rise to its shape. As the torque curve steepens the controllability of traction worsens, and the engine becomes less and less useful for daily driver duty. The power band will be narrower, and it will fall-off faster at high rpm.