I have clearly made a difference with most of my students. They greet me and try a little bit to speak, even if it is simply parroting the phrases from the book. A handful come to my desk and ask for a private talk, but that only may be to add another sticker to their book! However, they do try a bit.
It helps I'm starting my 2nd year with them, thus we don't have to get to know each other.
I also believe it helps that they are primarily country-side kids: children of farmers, fishermen and small business owners. It has been my experience that country-side folk tend to be friendlier.