i didnt have rwin settings to mess with on my router (Belkin wireless ) but i did have MTU.
I am on UKol's new signup for 2mb connection and by dropping my MTU form 1478 to 1430 i gained an extra 15-20k/s download speed! mind u anything less and it dropped out and anything more than 1478 seemed to hinder the connection.
Hope this helped someone hehe, it did me Nice one! this something i used to look into when i was on dialup :S sad leech that i was... i completely forgot about this when i moved to dsl coz i was extatic with the speed anyhow.
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10meg connection for 19.99/mo gotta be a steal lol..,
http://bsbb.bravehost.com
..., blame it on smirnoff
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