Yes I got the same variant and its performance is average compared to Synaptics touchpad but you wont feel the difference much coz some sensitivity problem was there in the starting models of Y500 and its already been fixed so you can go ahead with your order and as I said before if you feel Elan is not your cup of tea than you can always replace it with Synaptics later on.
Yes my Y510P has GT 755M and glossy FHD screen and I am lovin it!
Customer care people have no idea what their company's products have in them, they just know how to please customers. Rest assured that Y510P has Intel Core i7 4700MQ, Nvidia GeForce GT 755M 2GB, FHD screen, 2X4RAM, Elan touchpad, Seagate 1TB HDD, Liteon DVDRW, Red Glow Keypad with 3 Levels, JBL Speakers.....
So it means we got the newer model, actually I used to think exactly opposite!