Jake Lo, i've discovered that IntelMausiEhternet have very slow upload on my system (30-40mbit on LAN 1gbps link). I've replaced it with AppleIntelE1000e.kext, works much better.
UPDATE: i've found that both modules have problems with NFS/AFP connections. i have 2-4mbyte/s upload speed on LAN connection, and normal (30mbyte/s) speed using wi-fi. Download have no problems on both of modules. BUT, blackmagic disk speed test shows normal results when i'm using AppleIntelE1000e.kext, but copying files are still 2mbyte/s
UPDATE: iperf shows the same results - 50mbit/s upload, 990mbit/s download. i've tried to compile latest IntelMausiEthernet 2.3.0 and got the same results.