I can copy and paste my response to the github issue:
Not yet. This weekend I'm going to sit down and do some back-testing. One can easily leave values out of the known matrix, and see how well they are predicted in the rank-reduced SVD matrix. I can say, however, that I have tested it against the last ~100 or so games, and I've beat the line (The spread, not winner/loser) about 73% of the time so far.