Depends on how we look at it. On 1 February 1914 we were 4-0, well on our way to a 12-0 record. On 1 February 1918 we were 8-0 and on our way to a 16-1 season that would be awarded the national championship years later. 1 February 1926, same deal - 11-0, on our way to 19-1 and a post-dated national championship.
More recently, on 1 February 2000 we were 18-0; we'd finish 8-6. On 1 February 2010, 21-1 (we'd beat Providence the next night and Wes Johnson would injure his hand; we stretched it to 24-1, but he wasn't healthy until our fourth-to-last game).
So it's not our best start through this date, but it's tied for our best 23-game start.