Sounds very likely. I myself only play normals nowadays as the only account I own is my first one. I trashed my elo at lvl 30 when being in Nordic East. I took it down to 550~. I built it up on my own carrying while jungling. As I couldn't relay on others I made sure to trash their lane's opponent. Jungling Lee Sin, Malphite, Alistar, Irelia, Jax or Nautilus while give you an opportunity to gank a lane almost 90% of the time no matter if he's close to the tower or not. They also scale well late-game.
I moved to West and I started supporting in ranked and duo going AD carry. I'm currently 6-1 with Sona, 4-2 Alistar, Nunu 1-0, Janna, 5-2 and Taric 2-0. This being a more reliable source late-game we won more than I did alone. I'm currently 950 in rating ( I play ranked less than once a month actually ^_^, Me, my duo-friend ( actual RL Friend ) and a couple more plays normal premade 5vs5 instead. We even bugged once ( Well, I did ). He first picked Janna for me. Then I couldn't pick one of my own. I got Nunu. So we played Janna AD carry & nunu support botlane vs alistar + varus. We crushed that lane and won after 20 minutes actually.
Just a tip for you if you're in elo hell ( Which I still am, I just cant be arsed to continue on a regular basis )
Jungler
Duo-partner
Support ( Be more active, global so you can prevent noobs dieing all the freaking time )
Ad Carry ( Win lane, win game 90% of the games, other 10% is trolls, afkers in your team )
Also Warwick & Malzahar can snowball very well, most champs are just inferior to them late-game and their skillset is amazing.
Oh and dont play Nordic East if you expect good players.