And I think they mention that standard SW "fusion tech" is like practically unchanged in 20-40,ooo years?
Anyway as for Fighting at warp I only care about TOS. I my research I found this and perhaps further viewing is in order?
"That was fairly common during the original Star Trek. "The Ultimate Computer", "Balance of Terror" and "Elaan of Troyius", and ST:TMP all contain instances of FTL ships using weapons against sublight ships."
I will need to ss TMP again as I don't remember THAT particular instance, BUT as a kid I remember something about the others...
I also remember the Enterprise ESCAPING a weapon as it fired cause it was STL and they went warp in REVERSE!! It took a few minutes on screen
but they outran it, that's balls!!! (A Romulan plasma weapon). So if the crew is on the ball a STL weapon from SW can be outraced IF the crew knows it's coming in time!

[Edit]: Bingo, it appears the Enterprise under the control of the M5 Computer stays at warp fluctuating between warp 3 and 4 throughout the
ENTIRE engagement... Phasers and torpedoes are used...
http://ru.youtube.com/watch?v=SYENq1cp27E&feature=relatedWhen in doubt, I use TOS to answer all (if not most) of my questions since most of the Trek series that followed butcher continuity to a state worse than Swiss cheese...