A q6600 score about 170 in Sysmark. (2.4Ghz quad core)
A E8500 scores about 200. (3.16Ghz dual core)
A stock I3-2100 scores about 217. (3.1Ghz dual core w/o H/T)
A stock I5-2500k gets about 260. (3.3Ghz quad core w/o HT)
A stock i7-2600k gets around 275. (3.4Ghz quad core w/HT)
and just for giggles an AMD X6 1100t scores 204 (6 core no HT (thats an intel thing))
So if you just look at the e8500 to I3-2100 the there is not alot of gain to be had, less than 10%, when you just compare the processors.
Not that there aren't palces where these new processesors really shine but we weren't given a specific comparison so a general benchamrk is only fair I think.