Before the discontinuation announcement, turn around wasn't usually more than 2 weeks from the UK, sometimes as little as 8 days. The four rolls I've sent off since have all taken 3 weeks or more, and that was before the postal strikes started.

If you email ch-kodachrome@kodak.com with the unique ID from the mailer label they can tell you if and when the roll was received in Lausanne. I once had a roll disappear in the postal system for 7 or 8 weeks before it was even logged in to Kodak's system!

Ian