Originally Posted by
mahasamatman
I was responding to an incorrect statement.
I think you need to re-read the statement you quoted:
The first letter has always corresponded to the fare bucket.
The poster was talking about his/her experience since tracking this. Or are you saying that for his/her flights the first letter has not always corresponded to the fare bucket?
In any case, I have found this thread useful. Thanks everyone who provided some insight into this.