Slim Slag,
Initially yes pretty much so, but now just maintain a mild ketosis. I still dipstick the ketostix on a regular basis just to make sure.
I think there is no evidence (at least not that I am aware off) which suggests that ketosis is unhealthy. Of course a lot of people associate ketosis with the diabetic version which is something completely different and dangerous.
I think that the zone diet which you refer to may well be 'better' as I think that some real Atikins die-hards go overboard in advocating too much protein and fat. I just make sure that my diet is still varied and have not increased the intake of fat and protein, just cut out the carbs.
I recognise a bon vivant when you say:
Those carefree student days..................
Enjoy!
FD