The reason for this are many:

1. To begin with, Sony hinted at a release within next 6 months. That means it will release between now and February 2015. Now the release schedule for PS4 exclusives currently looks like this

Nw September release is out of question, and January is a very slow month everywhere in the world for video game sales and hence would be a bad time to release a highly anticipated game.

A holiday release would be beneficial to sales of the game itself and the sales of PS4 due to Bloodborne. Also Sony have a PS4 exclusive lined up for each month in the holiday so far, except December, and Bloodborne would be a perfect fit for that.

2. The system is not selling well in Japan. Bloodborne can easily be a system seller in the country. And there is no better time to release Bloodborne in Japan than in December, Japan's equivalent of a holiday season. If it releases in Japan in December, its likely to release everywhere in December, as Dark Souls games also have a history of releasing everywhere at around the same time.

but its been confirmed for 2015 hasn't it? early '15

Why would it release in 2014 if its been confirmed for 2015?

http://www.nowgamer.com/news/2469604/bloodborne_early_2015_release_date_confirmed.html

It was announced for early 2015...

Sony said early 2015, so unless they delay it then I don't think so.

It won't.
/thread

But at Gamescom, they stated it would be released in the next 6 months. It seems unlikely that they will let it slip past the holiday season in that case.

I hope it does release this year, can't wait for it.

They said these games (referring to more than 1) will release in the next 6 months yes. That puts it as end of march the latest, which is six months and a few days as they probably are starting their soony countdown at the end of this month. 

But confirmed for 2015. I'm guessing march because its a good time to release games.

The would of loved to have it out in 2014 same with the order but you can;t rush game development... well you can but it would be like chopping your arm off.

I'm betting on March