true, but when it comes to trains like rajdhani's, durontos and shatabdi esp on super fast routes(ndls-hwh, ndls-mum, ndls-bpl) wap 5 and 7 are obvious choices. And i also noticed it never touched the likes of 130's and 140's. I know wap 5 and 7 just touch these marks but they do ensure that they do touch such speeds but wap-4 today never looked like even close to it.