Well, I'm coming from the American perspective, where 5:2 has never been a fad, and practically no one knows what you're talking about if you casually mention it. Mind you, the good part of that is they don't have any negative preconceived notions either. Of course, once I mention that I eat only 500 calories 2 days a week, they usually recoil as though I'd offered them a snake!
I don't usually count; once in awhile I'll do that just to ensure I'm not unconsciously cheating. My big thing is, this IS my WOL for the rest of my life; if it becomes just another diet, I KNOW I'll go back to my old ways. I am SO surprised that I've found and have been able to commit to this WOL; currently down 32lbs (after just over 1 year). Would like to lose more, 25lbs or so; but as I've already realized my main goals (no knee/foot pain and normal blood pressure), it's all gravy from now on. I seriously doubt I'll ever have worry about getting too skinny, but if it happens, I'll deal with it then. By the way, I do what I consider "plain vanilla" 5:2--500 calories on Mondays and Thursdays; eat normally (not pigging out, but not "dieting" in any way either) on other 5 days. I tend to eat fairly differently on light days, lots of veggies and protein, no refined carbs, needless to say no alcohol...and a bit of healthy fat. Do not limit carbs on normal days; I plan on eating this way for the rest of my life, and life isn't worth living (for me!) without bread and an occasional pastry!