Disclaimer - Iread this on the internet a couple of years ago, so take it as you will...
The reason McDonalds had such good french fries at the beginning is that they were fried in beef fat. They gradually reduced the amount of beef fat and started using the trans-fat oils with beef flavoring. With their restaurants overseas- India specifically- they had to reformulate the oils to be vegetarian - so no beef for flavoring either. So, if you think the McDonalds French Fries are not the same as they used to be, you are right.
My mom used lard for cooking also. I tried making one of out favorite Saturday Special breakfast recipes - french pancakes (NOT crepes), but without a good lard to fry it in, they jsut weren't as good. Not even worth making. My sister found out the same thing.