I think it would be a nice addition to make it look like this:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fi61.tinypic.com%2F10z1p4p.png&t=663&c=CX68B7_efjjf4A)
The idea being simply that the number inside the parentheses is the amount of blocks downloaded, even if they aren't in order. It would give you an idea of how long it's going to take to download the chain and how the download is progressing.