Added Overclock.ru's S2740L and S2440L reviews.
http://www.overclockers.ru/lab/51131/Bolshoe_zerkalo._Obzor_i_testirovanie_monitora_Dell_S2740L.html
It seems 800:1-ish contrast seems to be the most common (3/5 of the reviewed S2740L's) for the 27" which is slightly below average.
http://www.overclockers.ru/lab/51131/Bolshoe_zerkalo._Obzor_i_testirovanie_monitora_Dell_S2740L.html
It seems 800:1-ish contrast seems to be the most common (3/5 of the reviewed S2740L's) for the 27" which is slightly below average.












