Well, according to some of the benchmarks for GW2, the GTX 550ti gets 100-120fps on minimum settings @1920x1080, my 560 ti only gives me 70-90 with the latest drivers installed.
Operating System
MS Windows 7 Home Premium 64-bit SP1
CPU
Intel Core i7 2600K @ 3.40GHz 66 °C
Sandy Bridge 32nm Technology
RAM
8.00 GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)
Motherboard
MSI Z77A-GD65 (MS-7751) (SOCKET 0) 28 °C
Graphics
VE248 (1920x1080@60Hz)
1023MB GeForce GTX 560 Ti (ASUStek Computer Inc) 33 °C
Hard Drives
932GB Seagate ST31000524AS ATA Device (SATA) 25 °C
Optical Drives
ASUS DRW-24B1ST c ATA Device
DTSOFT Virtual CdRom Device
Audio
Realtek High Definition Audio
Operating System
MS Windows 7 Home Premium 64-bit SP1
CPU
Intel Core i7 2600K @ 3.40GHz 66 °C
Sandy Bridge 32nm Technology
RAM
8.00 GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)
Motherboard
MSI Z77A-GD65 (MS-7751) (SOCKET 0) 28 °C
Graphics
VE248 (1920x1080@60Hz)
1023MB GeForce GTX 560 Ti (ASUStek Computer Inc) 33 °C
Hard Drives
932GB Seagate ST31000524AS ATA Device (SATA) 25 °C
Optical Drives
ASUS DRW-24B1ST c ATA Device
DTSOFT Virtual CdRom Device
Audio
Realtek High Definition Audio