Afp: write fast, read slow. Is that normal?

Hi,
I find that I can write fast over my network when using afp, but reads are very slow. This happens when writing from one mac to another (one running 10.3.9 the other 1.4.8) or between either of the two macs and a Linux server running netatalk 2.0.2. So I guess it's not OS or machine related, but related to either afp itself or my network.
When I try these connections with Helios LANtest, I get write speeds of about 2.7 MB/s and read speeds of 0.30 MB/s.
Are others experiencing this too, or is there something wrong with my network?
TIA
iBook   Mac OS X (10.4.8)   Debian Linux user

After a few experiment here... using activity Monitor to watch transfers though.
Via Wireless was really slow, much slower reading than writing though. On Ethernet 10/100 when one end was set to Automatic, copying from the distant one was about half as fast, setting it to 100/Full Duplex on both ends made reads and writes about equal... 1-1.3MBs
On Wireless, just not having the Copy Window in front would immediately drag it down from 100-200KBs to 20-60KBs, bringing the Copy Window back front would slowly take it back up to speed.

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