I would consider this a pretty minor thing, but I do remember the drop rate on spider silks being considerably (roughly an order of magnitude) more significant on the heart spiders in Upper Guk. This was the place I came and farmed them on my monk back in the day. I've been here the past few days for exp on my shaman and have gotten maybe 5 silks in dozens and dozens of kills. Tons of gemstones though, but no silk.
http://eqbeastiary.allakhazam.com/search.shtml?id=1436
This has several comments where people discuss farming them for silk as well. No biggie, but something I noted as 'off'.
-Stinkie