RDR was plagued with development problems.
You cannot look at what happened in the past and conclude that just because that happened it can and will happen again. You need to look at the factors. RDR was never at the caliber of the GTA series when it was being developed, it was still near the time where R* was getting used to devving on the consoles and they had run into a lot of development issues with RDR that were well-documented. The staff of R* San Diego were incredibly overworked.
Again, it was also never stated with RDR that it will not be delayed again by the actual people making it.....as it was with GTAV. Since that A & A we have gotten an exclusive interview with R* North, new screens, new info from a few magazines and GI, we have seen TV ads....everything is pointing to this game coming out in September.
Dude it's like you keep talking yourself into the fact that a delay will happen.