http://bugs.winehq.org/show_bug.cgi?id=17207
--- Comment #1 from Antonio López amlopezalonso@gmail.com 2009-02-23 13:35:45 --- Still in 1.1.15.
It seems most of the speed problems got to do with something related to snow falling: the retail game runs smooth until I reached the Alaska chapter. Most cinematics show falling so they are hopelessly slow.
You may want to check it on the demo: it covers part of the Alaska chapter.