Could just be semantics, as if she has had gastric surgery, your diet does change dramatically ie low carbs, high protein and much smaller portions. So the weight loss would still (technically) be down to a change in diet?!It's the principle - to my knowledge she hasn't specifically said how she lost it, but her (alleged?) personal trainer said on the Lorraine TV show that it was 90% down to diet. If that isn't the case then it could be damaging to her career because she'll be seen as dishonest. Although, given that she hasn't actually said anything personally who knows.
If she has had any form of gastric surgery, then it is certainly not the easy way out and will have been the result of a lot of thinking. (I'm 5 weeks post op and it is hard. Spent most the week feeling like i want to boak after every meal, wanting to Boak after I've had water, which you need to have plenty of. I swear my head has seen the inside of a toilet more this week then in my entire life! Plus the lifetime of tablets, all which need to be taken x amount of hours apart etc.)
I think she looks fabulous either way and I just hope she is happy.