Carl,

I couldn't agree more and have been trying to run down whether or not the black square test ball is going to be offered on the retail market.  I was very fortunate in getting an opportunity to test both balls and I am really hoping that the black square test ball made it into the new ProV1/ProV1X line.  It seemed closer to the ProV1X (which is what I always play), but I fell in love with the performance of the black square ball - super long and great performance all around.  Here's hoping it makes it to retail . . .

I agree 110%.  The black square balls were some of the longest balls I have ever hit.  Great feel. I wish I truly knew what they were.

I think the circle and square balls were tested in 2013 and we the new NXT and NXT Tour that were released in 2014.  I got what I'm fairly certain was a ProV1 and it did not have a black circle or square, but rather just Test where it would normally say ProV1.

The balls I received at the end of the 2014 season didn't have a circle or square either but only "test". I do remember reading that last years (2013) had a circle and square though. 

I received the black square and circle sleeves Fall '13. I agree the squares were long with good stopping power too but the circles were not too far behind with the woods and I took that trade off for great short game feel and predictability,  mid and long irons held nicely. Our Winter Park CC pros are on with Titleist now and our assistant pro bets that they were NXTs. I can't recall finding that thread.   

The sleeve I received recently was marked test though it also had the gr(a/e)y alignment arrow à la V1X. I am seriously impressed and shared with a group I paired up with, I was lucky they let me keep one. We all agreed they must be Pro V1X and we were all stoked for the release. I bought my first dozen as has my playing partner and I'm Sure those fun fellas grabbed some by now. Apologies to the manufacturer in my profile, I've made the switch. Thanks all TT members and Titleist for the opportunity,  I'm predicting huge sales on the rise and my handicap on wane!!!

I was lucky enough to get a sleeve of test balls.  It just had test on it - no squares or circles - I would say it was a ProV1x .

I'm just about 100% sure I tested the ProV1 and it did NOT have a square (or circle) on it.

WW

There may have very well been multiple lines sent out with the circle and square markings, but unless Titleist is changing the cover of the NXT line to match the ProV1/X, I am fairly positive the ones I had received and played with were something in the ProV1/X lineup.