I don't know what kind of TV you have, but that might be the case. I had a similar experience many years ago with SF4. I started playing SF4 on a 50 inch plasma that I bought in 2009. I was just a newbie level player like many others so I didn't notice a thing. My PS3 died and instead of rushing to replace it, I bought SF4 on PC. I played on my low input monitor and I don't remember noticing a difference. But around 6 months later when I finally sent in my PS3 to Sony to get repaired(basically just replaced though).
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But anyways, it definitely does matter what kind of TV or monitor you're playing on. If you're interested you could look up your model number to see if any there is any info about input lag posted.
My HDTV is a 2011 LG model which from what I've read and my own testing with 240p Test Suite is somewhere around 50ms of input lag. It's obviously much worse than my 10ms PC monitor, but I didn't think the difference would matter that much in a game with ~6 frames of input lag already baked in and my relatively low-level of play.
EDIT: Teh_Lurv, use anti airs. St.lk is a great one. I am getting way too many jump ins on you.
Don't abuse cr. hk or EX legs too much. Chun has great buttons such as st.hp for far away, use them. She certainly is one of the best characters regarding a neutral game using pokes.
Thanks for the advice. I've been working on my anti-airs recently, mainly practicing in casual using b.HK. I probably should be using s.LK more. I still need to practice my jump-in reaction time. Unless I'm fighting someone using a jump-in flow-chart, I'm not punishing jump-ins as much as I should.