I'm sorry, but the grain direction, or lack of a pronounced grain, and overall visual texture does not look like tri-tip at all. Maybe a less than select TT. It looks too lean.
I'm sure it'll taste great, but it really does look like some other cut off the sirloin.
I've had that happen to me several times down here in Austin, where I'll ask a so called butcher if he can get me a TT, he goes in the back, cuts something up, and brings it out, I'm looking at him wierd, and saying "that's not a Tri-Tip, he swears up and down it is, but it's really not.
Modded Brinkmann Gourmet. Basic UDS. Rescued 22.5" OTS. SJS Mini-WSM. Stubbs. B&B Oak Lump.
Cannondale 2009 F8 (for burning off all the great BBQ)