It's a normal checkbox in the gui "Enable SSH" / "Enable telnet", so I would suppose it is.
But further tinkering revealed it seems to be a quite-close approximation of IOS, but not the same IOS you'd get on the "older brethen" boxes.
It's about 95% the same, with differences in small details - the format of the output, the behavior on "more" prompt, the look of that prompt, the way the certs are stored, etc.
Nonetheless should be close enough to be usable in a geek home environment.
I got the software here, looks like it allows to download w/o logging in: https://software.cisco.com/download/release.html?mdfid=28301...
Since the box I had ran a rather old version, I had to do the intermediate steps as described in http://serverfault.com/questions/622724/error-illegal-softwa...
One caveat I noticed is the ssh seems to not work when connecting from Ubuntu 14.04, works fine from OS X. When I have time, I'll debug it further. (I very rarely do any changes on it, the CLI was more an unexpected bonus I wanted to check out rather than a real need).
