I recently (15.02.2018) travelled via Chetak Express from Udaipur to Gurgaon and noticed the electrification work there!
Udaipur-Ajmer Section:
1. Holes have been dug till Khemli (2 stations before Udaipur), great speed.
2. Poles have been erected after some stations of Bhilwara, still will take time to reach Chittaurgarh.
3....
more... Full wiring between Adarshnagar Rly. Stn. and Bhilwara Jn.
4. Ajmer Jn. is untouched by electrification. Even outers need work.
Rewari-Gurgaon Section (work is going on great speed):
1. Poles have been erected to good distance after Rewari. Holes have been dug on almost whole section.
2. Electrification in Gurgaon will take at least 3 months to complete with wiring.
Overall, speed of electrification is satisfactory and above par.
P.S. I might be uploading the video between Udaipur City and RanaPratapNagar (1080p 60fps) soon. I need it from a friend's phone.