Well, I tried it, and got very different results trying to instantiate 10,000 objects.
Enter number: 10000 Normal construction: 0 ms Activator-based construction with cast: 3 ms Generic activator-based construction: 24 ms Expression-based construction 1693 ms Done.
Enter number: 10000
Normal construction: 0 ms
Activator-based construction with cast: 3 ms
Generic activator-based construction: 24 ms
Expression-based construction 1693 ms
Done.