Would it be clearer if the status said "x confirmations", like:
2/unconfirmed
3/unconfirmed
4/unconfirmed
5/unconfirmed
6 confirmations
7 confirmations
8 confirmations
Each block essentially means another node has confirmed that it agrees with all transactions up to that point.
"Confirmation" would be more informative than "block". It's good if the user can relate the number of "confirmations" to the number of "blocks" in the status bar.