Help-Very bad video/audio delay with China user

I am using iChat with snow leopard in U.S. and my son is using iChat from China with leopard. We can bring up iChat. He can see and hear me clearly, but there is about a 10 second delay. I can see him but the video is very pixelated, blurry, and slow. His voice is delayed and somewhat garbled.
He has wireless internet in China, but I'm wondering if there's something we can do to improve the video/audio. We are both fairly new to the Mac, so any help is appreciated.
Thanks for the help!!

Sandra Foster who used to post in iChat 2's forum used to be the most experienced
http://discussions.apple.com/search.jspa?threadID=&q=China&objID=f900&dateRange= all&userID=&numResults=15&rankBy=10001
I have linked a Search.
However the issue goes back further than the current Forum Software and the early ones are not accessible.
It may also pay to change the Criteria of the Forum option to read iChat 3 and see if there are any others. (I think Sandra posted in iChat 3 but took longer to update to Panther)
She has not posted for a while.
10:23 PM Saturday; September 12, 2009
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

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... I'm sure Ralph or someone else will give it to you ...
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