With the recent changes to Singed...
I personally don't feel that Singed is better off because of the Q change. In my opinion it makes farming waves between towers (Not proxy style) harder because it makes him rely more on his auto attacks and very specific timing as opposed to where he could focus more on the lane opponent. (GNAR GET BACK HERE!)
With more ticks of damage each second it makes it easier for your minions to steal your farm (If you are not proxy farming) lowering your gold income. With lower gold income it becomes harder to buy items and when it becomes harder to buy items your win rate drops. http://www.champion.gg/champion/Singed
I made this post a bit late into the patch to make sure that it wasn't a knee jerk reaction to the Q changes, and to get more data. With a sample size of around 6300 games from plat + and about a 2.5% drop in winrate, I don't know if the ticks/second change or the bugfix caused it.
But what should I know? I'm only gold 4 with somewhere around 160K Singed mastery if my memory serves me correctly.
Could we get a few more Singed players into this thread to verify if this is 100% biased, invalid from my small pool of Singed games played by my this patch, not? I have been practicing Trist and Ryze as my new junglers since the revert to Kog's W and because of that reason haven't played too much Singed lately.