No, but sheer speed isn't the only measure of a drive. And the advantages of Culture FTL drives disadvantages are outweighed by it's advantages
I believe the Killing Time managed to rip through an opposing fleet in fragments of a second......the entire battle.
Assuming a culture vessel remains still to be shot at....
Proton torp/missile fire
Gets interdicted by nanohole missile defenses. or IIRC they can displace plasma/etc onto them
Okay. Do we have ranges on them?
IIRC, the Culture can just strafe you from hyperspace, so range really isnt a problem.
Hyperspace and other dimensions
Really, AFAIK theres subspace, normal space and hyperspace that claim can be made for..
So unless theres something which states it blocks everything I dont see it as worth taking into account.
Hyperdimensional is a nice statement, but it makes it seem a little over-arcing, which it isnt..
But the Culture is not as invincible as some would make you believe.
Im sure if their ships didnt move so fast during combat a Imp ship could shoot them//
problem is, they do move so fast.....