I See a lot of conflicting answers ranging from it is possible to have video conferencing to its not possible at all without physical presence, one of the lawyer i spoke to mentioned that i can have an agreement executed wherein she will convey her consent and get it attested by Indian consulate in US which then will be registered with a registrar, is this right because it seems to me the fastest way of getting it done??
What you have heard has either been misinterpreted by you or incorrect.
The POA deed alone can be attested by a Notary in the foreign country which would authorise her agent to sign the divorce papers on her behalf.
As a matter of fact if you feel that this is not possible you may file a contested divorce and send the summons to her address, if the summons are not received by continuously for three times then as per the procedures on further issues, the court may set her exparte and you will get an exparte divorce judgment, which will be more faster than any other mode.