Why are soo may Xbox titles going to PlayStation?

Time to put on the tinfoil hat for this one. I been reading every week almost for the past 5 weeks, that some Xbox title is going to Xbox after a year or less being out. So far I think I have read at least 5 or 6 articles on this subject, but it makes me question a lot things that have been going during the Xbox/PlayStation trial. This all leaves me question is something deeper going on and we just don't know about, but here are my thoughts, on this.