I haven't ridden the Turner, yet, but have owned a Hammerhead for almost three years and I recently moved to Loveland,CO after several years riding the tight & twist of Vermont. Over the years I've ridden a number of other high-zoot bikes like the Ells Truth, Tracer, X-5, El Salty, Litespeeds, etc...
Honestly, I can't say enough good things about the HH. It's a wonderfully verstaile bike. I've yet to come across any terrain where the HH holds me back. 3 weeks ago I did a 4 hr ride to the top of Crosier mtn with some good riders on Ventanas & Turners. It was probably the most technical downhill I've done and I pretty much had the lead both up & down despite their 5" of travel & Maverick forks. This weekend I was in Vail and rode 25 miles & 5500 vertical one day and 20 miles with 4000 vertical the next and had a big smile the entire time.
My bike weighs at 27# & change but is built for durability and comfort with a TALAS, Louise FR brakes, UST rims/tires, Thomson stem post, King hub & headset, PUSH'd AVA shock, etc....
A 25# wouldn't be hard to achieve but you would have to sacrifice some stiffness & plushness. 23# would be hard to get to and would require some serious weight weenie parts that, I think, might get eaten alive by the more technical trails.