All that matters to me is whether I can use it well as a tool to get my goals accomplished.
Surely whether a language is object oriented or not matters in design. If a language has features that enable object oriented techniques there are different design considerations than otherwise.
@jim - it's not that OO features have been added, it's that as of the past few years, we have been rediscovering the ones that exist already. ECMA standard, which is the standard developed after JS has been in the wild for quite a while, is itself almost 10 years old.