Blazorthorn, http://www.intel.com/content/www/us/en/processors/core/3rd-gen-core-family-mobile-brief.html?wapkw=mobile+3rd+generation+i5, FYI.
According to that document: i7, i5, and i3 will have HD4000 on the mobile side. It does not tell you he clock speed of the GPUs but they will be HD4000. Once again, cache size may or may not make a difference and that is determined by the benchmark (the type of data reuse and the size of the data). The extra cache, in fact, will be money wasted for some much like extra cores for people who don't do a great deal of multitasking or don't use applications that are highly threaded. My guess is that Intel probably doesn't clock them lower than 1100 except on the ultra low voltage laptops. Thus, I imagine performance of i5s and even i3s will be quite competitive on the GPU end.
Sigh, let us hope this is the end of this argument.