Wow...sorry for the book. This has bothered me on other sites, and so I've put an absurd amount of thought into it.
Although i find the threads with many posts that take up many pages are usually read and replied to by long time users, whom already know what the post is about.
I can see where you are comming from with you comment. And i can understand it's not hard to click the button that takes you to the newest post on the last page, but i just find the usually people replying to posts have either already replied to them and know the topic or can quite easily read up on the latest posts.
I just presume it would be quicker to have the latest post at the top of the thread, but that's just me.