I think if you want to eat low-sugar you should research the science behind the suggestion because you won't be able to commit to a plan you don't believe in - nor should you. From what I have read, no, the sugar in fruit is not the same as sugar in processed foods - there are different effects on your body but they are both detrimental. There are of course positive nutritional elements in fruit and so you have to judge if the positives outweigh the negatives.
If you're committed to eating full servings of yogurt and fruit every day (could you settle for a half-serving?), maybe a low-sugar plan is not right for you. You're not forced into any particular diet just because a website makes a suggestion.
I do eat low-sugar (< 15 g/day) and I don't eat yogurt, although I used to and I enjoyed it. Right now I'd just prefer to get sugar from fruits and vegetables. I eat berries and avocado and non-starchy vegetables, but not oranges or anything like that. So I will tell you that it's possible to eat well on a low-sugar diet - I really enjoy the food I eat and do not feel deprived or hungry - but it's up to you to decide if it's really something you want to do.
I lost 40 lbs between Nov 2010 and Nov 2011 doing low-sugar for my "50 Pounds in 50 Weeks" project. I bounced halfway back up so I'm back for more!
I blog about personal finance at Evolving PF
Last edited by ERHR; 04-05-2011 at 10:33 PM.