As the title says, you can only overclock so much, the cards under review(custom coolers and the works) consume more power than the GTX560 Ti(and perform lesser), which makes it kinda pointless considering the price is higher than a regular GTX460 and the GTX460 is an overclocking beast.
AnandTech - NVIDIA's GeForce GTX 560: The Top To Bottom Factory Overclock
EVGA GeForce GTX 560 SC Video Card Review - EVGA GeForce GTX 560 SC Video Card Introduction - Legit Reviews
ASUS GeForce GTX 560 TOP Direct Cu II 1 GB Review - Page 1/31 | techPowerUp
Palit GeForce GTX 560 2 GB Review - Page 1/31 | techPowerUp
MSI GeForce GTX 560 Twin Frozr II OC 1 GB Review - Page 1/31 | techPowerUp
The Nvidia GeForce GTX 560 Review: Take Off Your Ti : Meet The GeForce GTX 560
HEXUS.net - Review :: ASUS (NVIDIA) GeForce GTX 560 graphics-card review : Page - 1/16
NVIDIA GeForce GTX 560 1GB Review
NVIDIA GeForce GTX 560 - Hothardware
NVIDIA GeForce GTX 560 - TechReport
AnandTech - NVIDIA's GeForce GTX 560: The Top To Bottom Factory Overclock
EVGA GeForce GTX 560 SC Video Card Review - EVGA GeForce GTX 560 SC Video Card Introduction - Legit Reviews
ASUS GeForce GTX 560 TOP Direct Cu II 1 GB Review - Page 1/31 | techPowerUp
Palit GeForce GTX 560 2 GB Review - Page 1/31 | techPowerUp
MSI GeForce GTX 560 Twin Frozr II OC 1 GB Review - Page 1/31 | techPowerUp
The Nvidia GeForce GTX 560 Review: Take Off Your Ti : Meet The GeForce GTX 560
HEXUS.net - Review :: ASUS (NVIDIA) GeForce GTX 560 graphics-card review : Page - 1/16
NVIDIA GeForce GTX 560 1GB Review
NVIDIA GeForce GTX 560 - Hothardware
NVIDIA GeForce GTX 560 - TechReport