Obviously the Vita is still going to have some developers, but if true, this report certainly is interesting.Respected Japanese newspaper Nikkei has posted an opinion piece that states that a third party software developer who had been working on titles for Sony's PlayStation Vita handheld has since cancelled those projects and are instead turning to the Nintendo 3DS. Sony are being quick in denying statements that this is related to multiple companies.
While the Nintendo 3DS' original launch in Late-February (Japan) and Late-March (US/Europe/Oceania) was a serious concern for the company (so much so that they had to launch a global price cut of roughly £100 to encourage sales), the Japanese launch sales for the PlayStation Vita last December were even less in number; with a huge drop in sales after the first week. The PlayStation Vita is due to launch in America and Europe next Wednesday, so analysts are keeping their eyes on whether or not the western sales for the 3DS' rival will be any better.
EDIT: In regards to the original article, the Japanese language has no differentiation between singular and plurals, so translators often get things mixed up. Currently, it is said that one developer has moved from the Vita to the 3DS. However, could this be the start of a slippery slope? Who knows.