Yes, he is. Flight speed and movement/combat speed/reaction time. In order to prove it, I could use statements (like reacting in-between nanoseconds, even being flat-out stated that he can achieve lightspeed) but I preffer to use feats. Not only that, but I'm going to use feats of current (post-Infinite Crisis) Superman.
Flight speed
Flying aproximatley 25 light-years in minutes at most. (Vega is 25 light-years from Earth)
I'd like to bring up T-Vo. It's a rarely used power, but I was wondering if anyone has a complete list of the times it has been used and exactly what it did
Torquasm-Vo, a Kryptonian mental martial art, basically he needs to bring his brain up to a "theta state" in which case he can take a battle from the physical to the mental plane, and combat against reality warpers.
I've never read a story featuring it and only seen a few scans.
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Meh, if you wanna use real world science...light moves about one foot per nanosecond. 'Bout 3.3 nanoseconds to travel one yard. So, since he's got nanosecond reaction speeds, I guess a case could be made for it.
What I'd like to know is, How does Superman move (in flight/combat) FTL?
Pre-crisis Supes did it because writers just ignored the whole lightspeed-limit thing. But since the speedforce was invented to explain how the Flash could bypass relativistic effects as well as the lightspeed limit -- suggesting more recent writers are paying some heed to real-world physics -- what's the explanation given for Superman's FTL (or for that matter, his bypassing relativistic effects)?
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Shinier than a speeding bullet.
Don't even start me on how a human sized solar battery could create the energies needed to create this mini cosmic inflation. But for all the super geeks out there who only care about Power levels, i suppose its a literary device to get round the problem. Alcubierre drive = Deus ex Machina.
Well over the speed of sound could be anything from Mach 1.1-9.9% lightspeed, which is .1% under relativistic speeds, which basically means "near lightspeed" in this context. He never specified exactly how much above lightspeed.
Personally, I think Superman's combat speed is at least in the relativistic area, 10% of lightspeed or more, possibly achieving lightspeed or FTL in this regard. Of course I am not going to prove any of this, being far too lazy.
One thing I would like to ask is exactly how strong is Superman? Obviously above the Quintillion tons range, but generally how strong?