Most of them, Yes. I couldn't make any statistical estimation but I hadn't read anywhere where the applicantswere rejected coz of the said alternatives.
Let's face it, most of the applicants were from India and their MNC's are renowned for it's idiocy. The officer's would have already accustomed to it and the files processed under NDVO
may have the unwritten rule of accepting the alternate reference letters.
All that being said, the decision solely inclined on Visa officer. If he/she decided to reject your file, they can but that isn't the case observed fortunately
