I'd say shorter for lower levels, as it hurts low level players the most overall. Mainly due to lack of gear/items that a higher player would have. If your below lv 30 or 40, and you die, your pretty much garbage for an hour as you lose bascally every perk above level 1. You also got to consider how much easier it is to die in a17, in a16 I rarely died even playing dead is dead on the highest diffculty, in a17? I get wrecked on nomad at times, I have over 1800 hours or so in the game so i'm not new. Most of my deaths is BS like zombies from 100 meters+away somehow detecting me in a cleared poi then beelining it to me. Plus its pitch black so its hard to aim hits at them. Can't really get night vision early game unless you get very lucky and find them in a drop, if they even can drop.
One death me and my friend had, was we were in a room, we had nothing going but a torch, all of a sudden we have 5 zombies all busting in at once that beelined it right to the room we were in, we were even crouched and not moving, doors were shut and we boarded up the windows, so the zombies should have had no realistic way to know we were there. Unless even 1 torch is just like a massive signal light now. I love the new AI, but I think they can find the player far to easly at anytime, its not so bad during the day, the problem is at night.