It's nice to hear about other mothers weaning their kids off of bottles at the age of 1. I strongly agree that when you have your children attached to things that are associated with "babies" like pacifiers and bottles, it holds them back. Do you know what my friend was told when she took her almost 3 year old to the doctor and said he wasn't talking very well? The doctor said to take him off of the sippy cup! He said that it is holding him back from being a "big boy". I still have my 3 year old on a sippy, but I'm just saying. Anyway, if you watch children that are older, like 2-4, and still use a pacifier or a sippy, you will very quickly determine that they're coping skills are way behind those of a child who is cut off from a pacifier and bottle at the age of one. The child who doesn't take either after 1 learns how to calm themselves down internally, not externally.
BUT, to give some advice on your babysitter. I would NOT say anything to her, because you don't want to make her mad and then have her treat your child differently. Women who still have their kids on these things, I believe know that they shouldn't, and therefore do not take the criticism well because they know what is right, but don't want to put up with the "weaning period". I would seriously just explain to your child that sometimes mommies let thier child use a bottle for longer than they should, and that you're so proud of your daughter because she doesn't use that "baby stuff". Make her feel proud of not using it.