Wellllll yes and no. Originally Mac OS X versions were released very close. Just look at the dates for OS 10.0-10.4. That's five releases in the space of pretty much 5 years! Roughly 2000-2005. Then Leopard was supposed to be released in 2006, but was delayed until 2007 because Scott forstall and company were too busy on the iPhone. Then, because of the iPad they were slow to get Snow leopard out until 2009. Then after when lion can came out in 2011, things got back to what they usually were with yearly releases.
So here's your timeline for releases. Jobs oversaw yearly releases too, and from the start.
2000: 10.0
2001: 10.1
2002: 10.2
2003: 10.3
2005: 10.4
2007: 10.5
2009. 10.6
2011: 10.7
2012: 10.8
2013: 10.9
2014: 10.10
That's 6 yearly updates, and 4 2-yearly updates.
You could argue that a return to the 2 year wait is better, but it seems apple only ever did that by accident under stress.
The impression you get from many people is that they should do a Microsoft and release a new version ever 5 years or something. MS only does that because their users upgrade very slowly. They charge for their OS so they'd love to make more frequent versions. Although not any more, so they are copying apple like this. I bet they will update all the time now that windows 10 will be their base OS.
We get these for free and we complain. They still patch the last OS for a year after the current one is released. So in that way, each of these OS's gets at least 2 years of updates.
Basically, Jobs was a fan of the yearly updates and I think 10.3, 10.9 and 10.10 are great updates. Of course, the long waited ones are indeed down of the most belovef and for good reason. Namely the great 10.4, 10.5 and 10.6.