I just want to say that as an ARDENT believer in breastfeeding I really really still wish that we could all be more understanding that breastfeeding doesn't always work for some people.
The OP is clearly looking for some way of feeling better about the fact that she wasn't able to breastfeed and yet she really should not be feeling guilty at all.
I had a lot of difficulties with breastfeeding and for the first three months it was such agony that everyday I thought about giving up - I feel that I was just stubborn and I'm glad I kept going but during that time, I felt really really lousy and very sad when I saw all the 'breast is best' stuff because it felt like I was failing both my baby and myself in some way if I wasn't able to do it easily and naturally. This was me, total hippie who wanted nothing more than for the baby to be able to latch himself on and all the rest - I really wanted the breastfeeding ideal and was totally unprepared for the difficulties that we faced.
Now that I can breastfeed ok I feel very blessed to have been able to do so thus far and I know that if I had not been able to, I would look back and feel a lot of sadness and guilt about it - and that is not fair. Women really can judge others so harshly and make things harder and more complicated for each other.
I feel sad that the OP was feeling somewhat better as a result of some random article - the facts of the article are neither here nor there as far as I am concerned - what matters is that she, like many others should not have to feel guilty. Yes, there is a lot of dodgy stuff behind many of the formula companies, and the world should not be that way, but those of us that are blessed with the ability to breastfeed could do well to consider how our opinions on the matter make other mothers feel.