Wi-ME wifi connection times


I’d like some information on the connection times we’re experiencing on the Wi-ME :
We have an access point with WEP disabled.
We connect to this access point with the WiME device. This connection usually takes 3-4 seconds. Sometimes it can be less than 1 second.
Can someone tell me if the delays we’re seeing are normal? Should they be lower?

In advance, thanks.