Compared a couple of my more recent large builds to see how slicing speed compares. On my machine - Windows 11, i9 12900HX 64GB, V5 slices in about half the time of V4.1.2.
Glad to hear that you are seeing a big improvement! We tested a lot of different build setups to see how the speeds varied with different models and process settings. In general, the more complicated the setup, the higher the speedups (which is a good thing!). If you have a simple part that was already slicing in less than a second, there might not be much room for improvement. However, the more complex the print became with more parts and complicated settings, the larger the speedup.