I made that comment because you guys were still running the exact same lists as ones that have been tried in the past, but almost every time people realized that it was just a bad version of Threshold, just like this deck. To quote Spat:
http://mtgthesource.com/forums/showp...97&postcount=2
Basically, where Threshold has to commit a single threat to the board and protect it, you have to commit MANY, and you aren't running any cost cheating mechanics like Goblins does, and all of your creatures suck on their own, so if like, Muscle Sliver is countered or removed, all your Talon Slivers are overcosted Tundra Wolves.
Stifle and Chain of Vapor seem poor in this deck, though Pithing Needle is great. Chain of Vapor basically comes with the tagline "don't cast this until Crystaline Sliver is in play", which probably makes it worse than Boomerang, because people are going to bounce your Slivers if they have the chance. Stifle seems poor, especially seeing as you are already running Pithing Needle. Do you really want more than 4 activated ability stopping effects? It just seems like you are wasting spots that could be devoted to more board controlling effects.
I'm actually going to test this out, because I don't believe a word of it. Once I'm done with Battle of the Sets, I'm going to build the decklist on page 11, and I'm almost goddamn positive that it doesn't have a positive matchup against Goblins or against Threshold. You're manabase is poor, and you need to resolve and keep multiple, very specific creatures in play in order to have a chance of beating either of these two decks, which is unlikely because you also want to block.
Call me what you want to, but when people start going apeshit because I suggested adding Telekenetic Sliver, and people continue to defend their decks with 0 changes and frigging Talon Sliver, decks which up to this point have done very little, yet have been tested and run many times. It's not like this idea hasn't been done to death, so I don't understand all this resistance to try out these new, more powerful Slivers.