Recently I was on CO flight SJC to IAH that was horribly delayed. Of course missed my connection to the east coast. They re-booked on next available flight and the ticket was issued in Y. Didn't get an upgrade--to late for that--but did get 150% EQM! ( found out when I got hole that I would have had an upgarde on my orginal connection...)

This also happened once when my CO flight was cancelled and I was put on DL.

I wonder if this a glicth or just a hidden reward.

By the way CO was great. They had three people at the ticket counter when the plane arrived and all borading passes pre-printed. All you had to do was give you destination and name and in two seconds they sent you on your way. For those whose connections were more than a couple of hours they had discount food vouchers.