Mrjack - Hmm, I'm not sure about the non texture mods. Unless there's some kind of scripts involved, it shouldn't affect loading time. The texture mods can, depending on how good your graphics card is. So if you running on ultra with HQ textures...lol that can cause alot of load time. Again, depends on your rigs setup.
It'll be hard for me to notice slowdown since I'm running SLI. I haven't had enough experience with frostbite 3 to know how it loads textures. I know that skyrim had massive load times if you slapped on a ton of textures, unless once again you had a beastly graphics card that was overkill.
It sounds like you got mainly player/npc texture mods right? I'm curious to know how bad terrain will be for loading lol.
I never did check if I got in the beta, guess I should have a look lol. Been way to busy with Pillars of Eternity @_@
Right now I'm updating the Beta to see if I got the new one ;p