The OP may be on to something. I have a project with a delay send based on this blog post (one of the most direct how-to answers I have ever seen cake staff give on a question that had everyone stumped):
http://blog.cakewalk.com/...elay-effects-in-sonar/ Since I set my template up for this back in X1, my delay had always been in fx bin. After reading this, I decided to use the exact same settings but place delay directly in PC. It seems to react to tempo BUT it plays at a much more rapid pace when placed in PC. I'm still looking for differences that would account for why that is so.
Update: maybe I'm crazy. I swear they were playing at two different tempos. I opened the project again and did the same thing and this time they are the same.