Answers to all your questions...
Thank you all for your wishes!
No, my wife and I do not have the same last names.
My wife's fingerprints were delayed by 2 months (since she was visiting India). Looks like our whole process was delayed until the INS received her cleared fingerprints.
No, my(primary applicant) last name starts with an "R".
No, this is not the same name I have on e-nairobi.com traker. It has been so long since I updated anything there I cannot recall my old password.
Our entire GC process took 3 months short of 5 years, end-to-end!!! (Well, I still need to get our passports stamped and receive the actual "green" cards!!)