Not to beat this to death, but I went to the website you mentioned, and it also stated that cottage cheese is the better choice to yogurt. (or actually yogurt was sub optimal to cottage cheese)
"Sorry, but don't know where you got your info from but cottage cheese is never and I mean never first choice. You need to go to the website I left you and read on the protocol and see that the Webmaster there will go into detail on how cottage cheese is not quark and yogurt is the closest thing."
This is what the site you referred me to said:
"Since organic cottage cheese may be hard to find, and if available, may possibly be cost-prohibitive for many, you also have the (less optimal) option of using yogurt. If yogurt is used, 3 times as much yogurt as cottage cheese is required (i.e. for each tablespoon of flaxseed oil, add 6 tablespoons of yogurt) and even then it may not be as effective as cottage cheese/quark because it lacks the protein density of cottage cheese and may not fully mix with flaxseed oil."
Again it wasn't about I told you so but this IS a very important point.