With my experience through step charging, charge times have only increased by a few minutes. (Charging 3300s and 3800s only) Using the Much More CTX-C, The first step is a high amp charge, 7A, then it drops to .2 and back up to 6A to finish the charge. When its charging at .2A, it allows the battery to rest, before it charges at a lower amperage to finish peaking the pack. Batteries take more capacity, and stay consistent through the entire run.
Also if your a person that dead-shorts packs, the CTX-C has a lockout function, where it doesn't allow it peak the pack within the first 2 steps. Effectively reducing false peaking.