I would buy this ball too.  It was similar to a Pro V1x, but I thought it was hotter off the face of the club (driver, irons, and even putter). 

I use Pro V1x, and that's what I used to do the prototype comparison.  The prototype ball flew lower off the driver (less spin) and added about 5-10 yards more drive distance.  The most unexpected thing was how high the prototype flew with my fairway woods; much higher than Pro V1x.  I picked up a little distance off the fairway woods, but not much.  A little higher trajectory off mid irons, and a little more distance as well.  Felt like the prototype was a little shorter from 9 irons through lob wedge probably due to the higher spin rate off the short irons.  The prototype felt softer than the Pro V1x, and comparatively it flew about as straight as a Pro V1x.  The thing I've always preferred about Pro V1x to Pro V1 is the staighter ball flight.  Overall I'd say I like the prototype a bit more than what's currently available.  

Marsh C:  

You're profile within Team Titleist actually says that you play the Pro V1 golf ball.  You probably should make that change!

TT

Played a match against myself with a brand new ProV and the Test model.  I could only play 9 due to some inclement weather and the match ended up all square.  I made sure to use whatever ball 'won' the hole as the first shot on the next tee to avoid the second shot syndrome.  I have three more rounds scheduled this week, and I plan on playing a 'self scramble' today with both balls to see which one performs better.  Then I'll be playing a full round with the Test ball at my home course, and I will use a new test ball when I play the Par 3 with my Fiance over the weekend.  

Then I'll be filling out the survey.

I've noticed some subtle differences in the ball, the dimples look to be different sized, and the new ball seems more durable, (It took a good shot off the cart path and didn't suffer much a scuff) but I'm going to keep my opinions to myself until the survey period is over.

I would hate to influence someone else who is testing the ball.

A BIG thanks to Team Titleist for letting me demo these balls.  I'll be sure to update this thread when the testing is over. 

I received mine and played two rounds.  I actually wanted to compare them to another brand and I was pleasantly surprised with the new balls.  Now, for me, they seemed to be shorter off every club by about 10 yards.  However, they were much straighter and more accurate.  I particularly thought they came off the driver better than the other brand.  I would also like to know what you all felt but I felt they "felt" heavier off the clubface...not sure why.  They putted true and I enjoyed playing them......I too want to know what they were and I too would buy them!

Sounds like they perform well.  I'd love to try them, how did you get involved in the testing?  I always play Pro V1, unfortunately my club was out of stock this weekend forcing me to play a competitors "new technology."  Hands down Pro V1 is the higher quality ball, particularly lending itself to better scoring around the green!

I normally play the Pro V1. This ball seemed softer right off the first tee shot. I found the performance to be similar though the spin seemed less. I would definitely play this ball.