Post your wifi speed with iPhone 4

Hi, I've searched for posts were you can see the speed the iPhone 4 is connected with to the router. The problem is that my iPhone 4 is the slowest of all my connections, slower than my 3GS. Shouldn't it be faster? So please post your speed so we can see the differences between phones and specify if the router has the n-standard so it's not limited by that.

My setups is:
Apple Extreme a/b/g/n 2,4 GHz
MacBook 130 Mbit
iMac 130 Mbit
Apple TV 130 Mbit
iPhone 3GS (2) 54 Mbit each
iPhone 4 39 Mbit

Isn't there anyone else who can post their speed? On a forum in Sweden we have found that most seem to have the same problem but one (so far) who have 72 Mbit/s. Please publish and let us know so we can tell if there is a issue and perhaps find out the cause.