With a significant skill advantage, composition advantage, or a mix of the two, it can be done, I've won a 4v5 draft pick game that was rather equal despite the man down as we had a better team and played better

its not common though, and i usually dont bother trying, but we got a good start, so i figured id give it a shot and i guess we got lucky

I did it earlier tonight. So yes, possible.

Won more than a few 4v5, 3v5, and even a 2v5

a day ago, I played a game where we were 4v5, we had one ticket left, they had 400, and we brought it back to win. entirely possible.

To but it simply. No it isnt.

I was on a team that had a leaver. Before he left we had them 5 capped and spawn camped. They were not able to step off the stairs without dying. Ryze leaves with the score 450ish to 50ish in our favor.

The other team is able to steamroll a point so we back off and attempt to defend 3 points. Nothing we could do at all. The other team simply walked all over us due to sheer numbers.

Sadly dominion leavers hurt more than they do in SR. Atleast in SR you know your going to be leveling faster than the other team and you will have more CS. Not the case in Dominion. There are NO bonuses at all to a team with a leaver.

it's a lot harder to win 4v5 on dominion than summoner's, that's for sure.

Coordination vs unorganization, fellow players. A team of only 3 players realizes they have to hold onto 3 points desperately, and if the other team is running around divided, they could win. I had a game where a player on our team was AFK a good five mins, yet me and my buddy were able to ensure our side still dominated by a fair margin. We ended the match a whole 300 something Nexus health remaining.

I managed a 4v5 last night.

I've gotten very close to winning a 4v5. Love it when the 5 person team thinks they are amazing when they finally win, and brag.

I just lost a 4v5 by 50 points. We were doing really well, then I guess the other team realised they could exploit our weakness by running in to cap mid tower. Either someone left top or bot, leaving them vulnerable to a dive, or we lost mid - this really crippled us because we had no good response being one down.

Our Morde reconnected so it was a 5v5 for a couple of minutes, then our Riven quit, making it 4v5 again, lol.

I haven't won any 4v5s yet on Dominion. One or two close ones, and four or five stomps.

Something that frustrates me to no end is League of Legends has NO countermeasures in place for a person disconnecting. It happens so often, but there's no handicap or anything for the team that's down a man. They don't even lower the surrender timer.