The WEI has no real world relevance. It's the benchmarks that matter:
7% improvement in SYSmark 2012 score
14% improvement in HDXPRT 2011 score
15% improvement in Cinebench 11.5 score
13% improvement in ProShow Gold 4.5 results
25% improvement in Excel 2010 performance
56% faster performance in ArcSoft Media Expresso
192% higher overall 3DMark Vantage Performance Preset - Score
17% faster performance in 3DMark Vantage Performance Preset - CPU benchmark
199% faster performance in 3DMark Vantage Performance Preset - GPU benchmark
Intel's Ivy Bridge vs. Sandy Bridge Benchmarks Leaked