I strongly disagree with this whole notion, I think in fact that the opposite is true. With Git you can make sure that you merge when your story is actually do

I strongly disagree with this whole notion, I think in fact that the opposite is true. With Git you can make sure that you merge when your story is actually done, with Subversion you need to worry about other's changes if you commit all the time. With feature branches you only have to worry about integration into the mainline once, when your task is complete, which makes continuous integration far easier than with the SVN model. If we would need to call a VCS anti-agile, I think that would actually be SVN, which makes continuos delivery a lot harder.