actually it's not, but i suppose it would require having a high end pc and connection for you too see the difference, the most noticeable would be the un-hidden skill air balloon.
it's just that those that evg and pvp cry about a 1 second or 2 second delay like pressing a button, and then find a reason to call you a cheater even if you don't use mods just because they need a reason for why they just lost.
1 click isn't an instant resurrection either you still have wait for the 0-3 second dialog to press 1 button, so how long it takes after that can still be 1-6 seconds depending on pc, connection and mtu/nagle, using a local ui server, various other tweaks and a 1-3 second difference can be caused by anything.