No, why should we be?
Apple will patch 10.8 soon, trust me.
This IS a unique situation, in which the update is both a) Free, and b) Fully supported by all hardware running the older version, but also, even though they are a consumer-focused corporation, they know that not everyone will update immediately, and that
larger organizations need time to make a change. I expect to see patches for 10.7 and 10.8 shortly, might even see the occasional 10.6 update continue (but not holding my breath on that one!)