You said "Having the ability to burst into the public cloud represents an appealing option. This is also why ultimately hybrid cloud is becoming the new normal..."

That's spot on. When I'm asked how I would determine the best-fit solution for a particular cloud use case scenario, my response is that "it depends" (on your key priorities, and your willingness to be flexible to meet those requirement needs/wants).

Besides, the whole notion of a hybrid cloud solution means that this doesn't have to be an "either or" decision -- it's not a binary choice, and therefore you inherently have alternative options.

Moreover, those CIOs that want to assume the cloud broker role for their organizations will need to look more closely at their vendor's or service provider's willingness to partner or collaborate with others in the marketplace -- to achieve the best fit.

Active members of the various open source cloud software communities tend to have the most "adaptive" perspective.