Hi Sir,
Are you taking about district courts or High courts and supreme courts also? If you include High and Supreme Court then the % will come down drastically.
My father is working in Pb and Haryana High court for the past 20 years (Special Secy. to different judges, including Chief Justice). He has close contacts with over 70% Judges in different High courts and Supreme Court.
By his experince I can tell you that you are getting it wrong. Of all the judges he knows over 90% are clean in every manner. The backlogs, time taken for justice and special treatment to VIPs are not due Judiciary, its because of Police and Lawyers.
The backlog is due to very less number of judges in High courts. (You can verify on Google).
The special treatment to VIPs is due to Lawyers and Police. You must know that if on 1 hearing if Lawyer says he is not well and cant come for hearing, the next hearing is postponed to 6-8 months (again due to backlog).
Secondly Police doesnt submit enough evidences at one go and the lawyers always play with their evidences (it agains take much time).
About Manu Sharma and others its Police/State Govt. who provides evidences that whether they shoud get parol or not.
Judiciary works just on the evidences and people. So it would be not good to blame them for slow work.
I can say all of these because I am part of it.
Hope this will clarify many misunderstandings to all people.
PS: Malik sir is right about Lower Courts but still only 50% of them are corrupt. (We cant say very corrupt here because 50% is way less than % compared to politicians, police etc.))