Major tech pubs put out their Snow Leopard reviews last night, and they’re all predictably positive. Snow Leopard offers lots of small and subtle improvements to your Mac plus gets speed boosts out of even older hardware for an affordable $30. Here’s the rundown of reviews seen so far:

• Gizmodo: Snow Leopard Review: Lightened and Enlightened–lots of great charts here demonstrating SL’s speed increases doing various common tasks on your Mac
• The New York Times’ David Pogue: Apple’s Sleek Upgrade
• Walt Mossberg: Apple Changes Leopard’s Spots
• Macworld: Snow Leopard Review

Even though Apple suggests Mac users without Leopard buy the $169 Mac box set to get Snow Leopard, anyone can purchase the $29 Snow Leopard disc and install it. This means the Snow Leopard DVD isn’t an “upgrade” at all, it’s the full-on Mac OS X operating system for 30 bucks, $100 cheaper than Leopard was. I suspected this was the case, since it is with the developer build I’m running, but The Wall Street Journal’s Walt Mossberg confirms it’s true for the final release as well:

For owners of Intel-based Macs who are still using the older Tiger version of the Mac OS, Apple is officially making Snow Leopard available only in a “boxed set” that includes other software and costs $169. The reasoning is that these folks never paid the $129 back in 2007 to upgrade to Leopard. But here’s a tip: Apple concedes that the $29 Snow Leopard upgrade will work properly on these Tiger-equipped Macs, so you can save the extra $140.

So if you’re jumping from Tiger to Snow Leopard, you saved $129 bucks never purchasing Leopard and you can save $140 skipping the box set. Guess being a late adopter does pay off.

Check out Amazon for the $29 Snow Leopard disc.