I wouldn't say I was shocked! but attitudes towards drinking and pregnancy are fascinating and frustrating across the board, IMO.
I think current NHS advice is confusing, and actually backfires in that it makes people less likely to follow it. It advises total abstinence - followed by advice to limit intake to 1-2 units, once or twice a week (so that's a max of 4 units, spread out, right?) - followed immediately by advice 'not to get drunk', and not to binge drink (which btw they define as more than SIX units in one go, not four). A lot of people are going to read into that what they want. Esp if they know the advice to abstain is based on a lack of evidence about the effects of low level drinking anyway.
I also think the 'we're all educated and can work it out for ourselves' angle is a bit optimistic, to say the least. Working out how many units are in various drinks is beyond a lot of people, pregnant or not. It's not their fault, the drinks industry have made it bloody hard. And frankly, on MN, where folk do like to pride themselves on their intelligence and education, it's been clear from a number of threads that lots of women don't actually know how much they are drinking (i.e. that standard middle class unit of consumption, the 'glass of wine', is more likely to be closer to 3 units than 1, given the strength of modern wine and the size of modern measures).
Personally, I dislike the pressure on pregnant women to drink nothing at all - I'm not aware of evidence that a VERY low intake is damaging, and if folk are genuinely concerned about pre-natal maternal and fetal health, than there are so many other issues that are more important.
However, I also dislike the weirdly macho 'if you're not necking a bottle of wine a night, you're a martyr/giving in to da man/letting the sisterhood down' stuff. Totally pointless posturing, and playgroundy one-up-manship ('had a margarita last night, baby not dead yet! Whoo hoo! ' etc.) If that's sensible informed adult choice, then I'm a banana.