I went from Gold V to Plat V in 2 weeks and half, playing maybe 3 games max every other day. Really not that hard unless you're unable to progress due to skill level. Yea, trolls sucks sometimes, but one or two losses didn't weigh me down much.
Same name in Leagues, titanic3. Plat V (currently), add me and send a message, I do play mostly every evening in 5v5s, always welcome to join the group.
Plat V is about the top 10% while Diamond III+ is top 1%.
To put it bluntly, I don't play ranked unless there is an incentive. That's why the complaint I have is they make those announcements so late into the season. With less time than that (I've hardly logged in here outside FSO and the current Scenario, much less on League of Legends), I'd want the whole season to play with. It also gives me a buffer in-case watermelon hits the fan. As is, I've yet to put in the required games to get a standing for the League. I didn't have an incentive. Now had they announced in the beginning or shortly after the season was underway about the Victorious skins (both Janna and Elise), I'd damn well get my arse in gear.

With how talk goes in LoL, I was under the impression that unless you were Diamond+, you were below 20%.

Shows how much I actually keep track of that stuff.
