What difference would Jan Lokpal make

Am confident that after such huge support for the Jan Lokpal, the government will have to budge to agree to the demands of Anna.
Whether people understand it or not, we are tired of "government corruption" and we want change. BTW, the differences between the draft and proposed ones are here

I really like Jan lokpal version because of these
a) Lokayukta to be in all states
b) whistleblowers to be protected
c) Corruption at all levels of government to be probed, not just limited to Group A officers and above

Anna looks innocent, actually. He believes that the common man hates corruption, but is succumbed to it. But are we? Always?

We seem to be selective against corruption. For instance, with or without the lokpal bill,

• What stops us bribe the police who asked for fine because we broke traffic rules.
  
• What stops us to build houses/buy flats follow the guidelines and by-laws laid by the corporation? Our apartment did not adhere, and we paid a bribe for registration.

There are broadly two kinds of corruption. One, where the bribe-giver' case itself is not clean. To cover it up and get his work done, he corrupts. I guess Lokpal is inactive here. These will continue to happen.
The other kind, is where you don't want to bribe, you follow the rules, and still you are troubled by the govt "servants". The bill tries to help the latter.

As with many other bills, we make it or break it in the implementation.