I absolutely agree, and wondered the same myself. My consultant says eat as much fruit and veg as you like, recommends mixing things up and always makes mention of 'ringing the changes' which from listening to others in the group seems to be the main component. When someone who goes along at 1lb per week for months then suddenly pulls a 3lbs loss out the bag, 9/10 times when Suzanne asks her what he/she's done differently, it's not something quirky or unusual (like the green tea challenge or upping exercise a mental amount- but I'm willing to try all the easy strange ones like lemon in hot water, worth a go I figure
!!) but it'll be just trying new recipes or using fruit/veg that they don't usually have week in week out. I hear it so often in group 'well what on Earth have you done to earn THAT loss? Share your secret!!' 'Oh I tried the aubergine moussaka and vegetable lasagne recipes from the magazine and have tried spaghetti squash and had some lychees instead of my usual grapes' and the like...
I also notice that if someone's been consistently losing, and then it slows up or they have a maintain week and can't think of what they've done wrong, Suzanne often says one of the first things you can look at is reassessing the balance between the fruit and veg, so if you're eating lots and lots of fruit, it might be worth trying to have slightly less fruit but to balance it by upping the veg intake. Just as another kickstart to get the body going again and restore the losing pattern. I think that sounds sensible to me, hopefully it helps you too