A couple of general things stand out for me.
Bhagwan has done his own research, best thing ever. Lots of people say have read this author or that author, and I have. Do your own research, I could name a well known author of racing books, that you would all know who has produced plenty of stats on what wins.
I did my own research on the same factors and came up with a different result. Thankfully for me it now forms the basis for a successful income from racehorse investment.
The other is Chrome Prince has found what pays and what does'nt, all the stats don't make you money, more research again is required to find out what makes money and to be honest that is what matters.
It takes time and perserverance to continually update your records, of all types and plenty of times you will come up with nothing but if your lucky you will find something that pays.

Good Punting