GTa IV multiplayer cheaters?

[Last Kronin]

Decided to play some GTa 4 last night after a few months of not playing, went and played some multiplayer and got real annoyed with 2 people who could kill you in 2 shots with any weapon from any distance, example, was running to capture a 'turf' and this guy was a fair distance away, so i aimed in and zoomed while i was capturing the point as soon as i saw him i started to shoot with the ak-47, he killed me with 2 shots from a pistol even though i was wearing body armour and his head was just a small dot on the horizon.

Another instance of some dodgy dealing, i was hiding behind a house he was atthe otehr end and he shot me thru the house, 2 shots and i was dead

 

[Last Kronin]

thats why i had the ? after cheaters, no idea how they would be able to cheat on a console, but glitching seems to be common in console games. It just seem very suspicious when a team of 2 players can kill everyone else in 2 shots and not die once in a 30 min game even when you have the better weapons.