Well, actual DPS is calculated by damage directly to the hull, damage to shields doesn't really count.
That's why damage numbers are low against shielded targets and go up significantly when shields drop.
So it is very possible to get 10k damage numbers with a cruiser or sci vessel, if you build around bypassing/disabling shields as best as possible.
DEM3, Transphasics, target shields, etc... the usual stuff.
Doesn't mean you will be able to kill quickly or at all.
If you continually get your damage past shields you will have high dps but the target may be able to outheal you still, since you can't do the damage quickly enough to overcome it's healing abilities.