Comment by MereInterest

The branching isn't the problem, but the merging is. My experience is that it depends on how closely the team is working together. If everybody is working on separate files, then SVN can merge together on a file-level. If people are working on the same files, then every such file requires manual merging. Since git works on a line-by-line basis, merging is much easier. It still requires a human to look through the resulting merge for logical consistency, but it gets a lot closer on the first try.