I am curious to know where this info came from, I found it strange that when I did a search for rust resistant daylilies registered in 2015 I came up with a total of 39, and they were all Gossard registrations.

I wish I could tell you. If you can work up the nerve to ask Gossard personally, I'll bet he'll tell you how it works. I don't know much about him, personally, but most DL hybridizers I hear people talk about are very nice and very eager to give you information.

Well, I would think the rating from Gossard was based on his/her? observations in his/her garden., I was not questioning that. I was inquiring how it was entered into the database here, because I thought it strange how they were the only such listings to appear in several years.
I guess my real question should have been "is there still an active entering of rust data from University Research programs that do studies on rust resistant varieties?".
But it would be very interesting to know if hybridizers are going to start listing rust resistance as one of the traits of their new releases? Why, did after several years of no such listings are the Gossard plants included showing all of them to be rust resistant, were all the others rejected because they were not, or has the breeding program just resulted in all rust resistant plants? Is rust even a problem in that particular garden, and were the plants grown in other locations to test for rust?
Yeah, maybe I should ask, even though that was not my initial inquiry. I think any response would answer some of the questions.
I thought all that info for new releases were imported with the AHS info, but apparently anyone can enter the info if they find it available. Char answered that over in the daylily forum, and I did not word my question very well here.
So I asked up further about the the relationship of the two data boxes for rust ratings, but have not received an answer on that yet.
Need clarification on Rust Resistant Rating
The thread "Need clarification on Rust Resistant Rating" in Plant Database forum

Seedfork said: has the breeding program just resulted in all rust resistant plants? Is rust even a problem in that particular garden, and were the plants grown in other locations to test for rust?

Jamie Gossard is in USDA Zone 5, Ohio where rust shouldn't overwinter (other than possibly in a greenhouse) so one would assume either the plants were tested elsewhere, the ratings were posted by someone other than the hybridizer who has grown them, or he has some method for testing where he is, which is possible because I've done it here in USDA Zone 4.

The only problem is we do have to "Assume" all those things, but it would be nice to know how it was all actually done. Not only that, but were these things done in past years, and not mentioned?
Why is it all of a sudden in the database? It was included on the Gossard website this year, was it include in past years and just not entered? So many questions!!!
Just want to add, I think this is great!! I am all for more info on rust being made available, I would just like to understand the originals and methods better.

What would be useful would be a rust resistance/susceptibility database such as the one we had associated with the AHS (and which was incorporated into the ratings here until it developed technical difficulties) as it accumulated the ratings from multiple people, not just the latest person who entered a rating.

Seems like I read somewhere once that Gossard also had daylilies he was hybridizing in a Florida location in addition to his home base. That's just a memory, so it might not be correct. I expect some other hybridizers know whether he works some in Florida. If the memory is correct, then his rust evaluations may come from there.