I was shocked by those numbers of " 5% keep it off long term".
Then I had a few very precise thoughts on this matter:
1) Likely the other 95% didnt have the good sense and/or willpower to stick with it. NO diet works unless you work the diet!
2) LowCarb is the ONLY diet that has EVER let me lose more than 2-3 lbs. Im ashamed that Im not at goal already, but the fact is, low carb has kept 50 lbs off even under the most stressful 2 years of my life. Losing jobs abruptly, divorce, giving up my house, living with my parents
moving 3x, going back to school at 43 years old, more stressful jobs, lack of jobs b/c of the school hours etc...
OP, Im not sure that statistics will ever do anyone any good in the weight loss battle. If only 3 people try something, and it works for those 3 people, then you have a 100% success rate!
But I dont think we'd be able to objectively look at that and determine anything about it. Dieting is very much a person by person experience. What works for one is in absolutely NO way guaranteed to work for another, even if they follow it absolutely to the letter. As far as low calorie diets? I know plenty of people who have lost, and kept off the weight using low cal diets. Just as I know a ton that have gained every ounce back plus a few. For me, low cal diets would NEVER work because 1) I dont like the foods I'd have to eat such as tons of veggies and Im not going to eat anything I dont like. Not in a sulky 2 year old sullen way, I just know me and what I will do and wont do. 2) My body makeup thrives on high fat / low carb and why on earth would I argue with it?
Ugh, this is way too long but know that I do hope you and your mom both find whatever works for you, still allows you pleasure with your food and obtain the desired results. Whichever plan it might be.