It seems to me like the presenters know they've got huge expectations to fill and have clammed up accordingly. The dialogue seemed somewhat nervous and wooden, but none of them seemed annoying or dull enough for me to go watch something else.
The cinematography and editing seem to be a step down from the original. FIX THE SHAKY CAMERAS. The background music is nothing special or interesting, but it would cost a fortune in licensing fees for them to be like the original in that regard. Edits weren't as fast-paced and music video-like as TGUK can be, which is both good (sometimes it can be a distraction in the UK show) and bad (they needed some more distractions this time around, IMHO). Don't just sit there on a shot of the guys doing nothing--cut away to something more interesting or do some post-production trickery to keep things moving. Oh, and have I complained about the in-car cams yet? FIX THEM. OMG. Tighten your mount's bolts better. Get sturdier mounts. Ask if postproduction can keyframe out the movement. Shoot, go to a trackday, find the guys with cameras mounted on their cars, and pick their brains. (Or hire me, haha. Even my in-car cams weren't that shaky.) It is completely distracting to have cameras vibrating while the car's idling and two of the hosts are talking to each other. It also didn't give me any better idea of the speeds they were going than, say, a simple shot of scenery whooshing by.
The content seemed good, although I kind of lost interest during the Viper/Cobra chase. Laser tag doesn't particularly translate well to TV, no matter what kinds of awesomeness it's mounted on. I also get the feeling that TGUK would've done something a bit more perilous and explosive instead, haha. Helicopter vs. C4 'Vette, Evo VIII vs. the military, the Fiesta landing, etc., etc.--when the "cult following" you're trying to woo is used to epic kabooms and over-the-top stunts, go big or go home. The intro about the Viper was well-done, but the laser tag segment seemed to drag a bit. The Evo vs. skiiers chase looks a bit more like what I've come to expect, so I'll probably watch this week's episode when I get a chance.
Star/small car or whatever seemed half-done. Either take the time to get in a full interview or cut this. There were plenty of pauses in the show that they could've cut for extra time for this, IMHO.
Then there's the guy in the white racing suit. Either make him a full-blown character like the original Stig or don't bother. Have him listen to silly things in the car. Introduce him by his quirks. Otherwise he's just an anonymous driver, which could be fine to avoid more OMG STIG drama, but it makes calling him a Stig seem half-done.
That's a good assessment of TGUS, really: half-done. Polish it a tad and it'll be an interesting show.