You have an hour to "break in" an engine. Once its up to operating temperature, pushing it hard and bursts up to redline will ensure the rings get seated properly.
I wouldn't do sustained high speeds and rpms, but hard loads will get the engine "broken in" and parts meshing. Finding a steep hill and coasting down at moderate rpms under no throttle (engine braking) is also beneficial.
Babying your engine makes you feel better, but has no benefits to seating those rings!