For ~1 month, 18% of all Macs ain't bad, but we can do better...
Don't get me wrong, I would not be happy if it stayed where it is now, but if you compare 10.6 to 10.5 or 10.4 adoption, it's pretty favorable.
The annoying thing to me is that certain (completely non-generalizable) statistics suggest that most 10.6 upgrades eat away at 10.5, but not 10.4 so much. (http://update.omnigroup.com, click on "Major Version") Tiger is still declining steadily, but as a developer I'd be quite happy if that number dropped to very near zero. With the exception of a diminishing population of PowerPC systems that don't meet the minimum requirements, nearly EVERYONE can run Leopard. I strongly recommend it, since Leopard is faster on the same hardware, and is such a huge step up from Tiger. I think it's time for a crusade...
If everyone who upgrades to Snow Leopard were to give/sell their now-unused copy of Leopard to a Tiger user, the world would be a better place. If you know a Tiger user, convince/help them to upgrade to Leopard. Make them an offer they can't refuse. Don't let your old Leopard disc become another coaster on your desk — donate it to a needy Mac user!
I've been remiss — I have two brothers,0 my parents, and mother-in-law still on Tiger, and it's time for an upgrade to 10.5 minimum...
How about bringing Christmas in October?
It may seem like a cheap present, but it's the thought that counts, and the recipient will thank you many times over. Plus you'll get good karma from Mac developers who will be able to drop support for 10.4 and use the latest and greatest APIs and technologies. Pretty please? 
Don't get me wrong, I would not be happy if it stayed where it is now, but if you compare 10.6 to 10.5 or 10.4 adoption, it's pretty favorable.
The annoying thing to me is that certain (completely non-generalizable) statistics suggest that most 10.6 upgrades eat away at 10.5, but not 10.4 so much. (http://update.omnigroup.com, click on "Major Version") Tiger is still declining steadily, but as a developer I'd be quite happy if that number dropped to very near zero. With the exception of a diminishing population of PowerPC systems that don't meet the minimum requirements, nearly EVERYONE can run Leopard. I strongly recommend it, since Leopard is faster on the same hardware, and is such a huge step up from Tiger. I think it's time for a crusade...
If everyone who upgrades to Snow Leopard were to give/sell their now-unused copy of Leopard to a Tiger user, the world would be a better place. If you know a Tiger user, convince/help them to upgrade to Leopard. Make them an offer they can't refuse. Don't let your old Leopard disc become another coaster on your desk — donate it to a needy Mac user!
How about bringing Christmas in October?