Good question. I have the 15.0 degree TSi2 head, Tour AD DI 7x shaft, and GP MCC White midsize grip. I had the heaviest +4 blue weight installed when I ordered my club directly from Titleist installed because I like to feel the head in my swing, and more weight in the head gives me the feel of a heavy hit. The order sheet I received stated it was swingweighted at D6 but I did not have a grip installed because Titleist did not have the White GP Multi-Compound Midsize as an option. So with the 59 gram Midsize grip, as opposed to the 46.5 gram standard weight GP MCC grip, I figure the swingweight of my TSi2 3 wood is probably D4-D5. Which should match my TSi3 driver, Tour AD DI 6x at 44.75", which had the blue 12 gram weight installed to make it swingweight around D5 (slightly shorter shaft with GP MCC White Midsize grip).

With all that said, I too would like to know the weight of the 15 and 16.5 degree heads.

Take the club head to a postal store and see if they will weigh it for you.

According to the custom catalog available within a club monograph, the TSi2 fairway standard is 9 g. The weight shipped would only vary on custom lengths or swing weight requests.