Are DO students almost guaranteed a residency spot somewhere?

So I came upon these stats regarding AOA residency spots post match 2017 Summary by Program Type There are actually 100s of unfilled spots post match which seem s pretty crazy. Does this mean if I fail to get anything in the ACGME I have nice backups waiting for me? I'm a 4th year Or do all these unfilled AOA spot get filled up during the month between AOA and ACGME matches? How fast would these positions fill up in the... Are DO students almost guaranteed a residency spot somewhere?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums