All things being equal, it is definitely slower than a hard wired connection. But the difference is not that big with ADMS 2008 & IV Pro 2008
One is like molasses flowing down the hill on a 60 dF day, while the other is on a 50 dF day.
Vault 3 was noticeably quiker in the same environment.
SBS2003 Premium
IV 2008 Pro w ADMS
IV 2009 Pro gathering dust somewhere, anticipating speed issues will get worse.