Well, I meant the nonsense delay before you even get to character selection screen for example and getting stuck on "requesting character load" afterwards.
The login process is still fairly long even without addons.
The effect of addons can be best observed with /reloadui. I think the shortest I saw was around six seconds without addons, which is pretty good. Typically with the amount of addons I have, it's somewhere between 15-20s, which I got used to. It's the cost of using so many.
But the other loading times are ridiculous. I raved about that
here.