Both old and new server used some type of RAID configuration. The network guy said the RAID on the new server should be more efficient. The new server also has SQL Server 2005 on it for now with plans to upgrade later this year
Different RAID types offer different performance benefits for reads versus writes - can you find out exactly which RAID types are specifically being used for the database files? Could very well be that your log file (LDF) is sitting on some RAID 5 (or worse) and you're seeing the performance hit due to waits relating to the log file. The same could apply to your data file(s)...
If your stats were good before, they should be good now (as no DB upgrade has occurred yet from 2005 to 2008). As others have mentioned, it wouldn't hurt to update the statistics any way, and maybe check for index fragmentation.
______________________________________________________________________________Never argue with an idiot; Theyll drag you down to their level and beat you with experience