No.
Are you seeing deadlocks? Are you having queries failing with the error "Transaction X was deadlocked and was chosen as the deadlock victim"? Deadlocks and blocking are two different (though related) things. If you're just having blocking, the deadlock trace may not show anything up at all.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability