Even a well set up turbo will require some time to spool. There will be lag, just a question of how much.
It’s possible to use VG technology to assure optimum aspect ratio for different engine speeds, or anti-lag, but typical well set up systems don’t have this technology. The use of lightweight rotating components does not eliminate lag, it only reduces inertia…
Additionally, if the goal of the turbo setup is to minimize lag, maximum power would suffer anyways.