Is it me, or are people getting unnecessarily defensive here? Ok I may have overstated the case (read: posted an unsubstantiated statement) but meh.
Omen/Threat is certainly useable, though agreed not as a reliable raiding tool just yet.
I don't think you can discount idle time usage, memory usage etc (let alone ease of updating and the open source arguments) as benchmarks for peformance of an addon but I'll let that one slide.
Though it's probably a bit early to compare a mature addon like KTM with a beta product, when the time comes I assume for the purposes of comparison you would accept that a comparing addon performance stats for a 10-man raid would be acceptable? (I'd have trouble convincing my whole guild to install a pre-release addon just for testing purposes
)