Galan007
|Quantum Observer|
Frieza did possess upper-echelon power. I know it's easy to forget this fact, given the ridiculous levels of power we saw in the Android/Cell/Buu arcs, but prior to the Namek arc, Frieza was the most powerful mortal character in the mythos, by MANY orders of magnitude.
Remember, even his BASE form(PL=530,000) was still several times more powerful than any other mortal being in the universe. In fact, the closest PL to his own was likely Ginyu's(PL=120,000)--the rest of the universe's 'high-end' powers were around the 30,000-40,000 mark *at most*. So yeah, that's what Beerus knew/remembered when he went into hibernation 30+ years ago. I imagine it would be very shocking to learn that in such a short amount of time, multiple Saiyan powers had arose that made even Frieza's FINAL form(PL=120,000,000) look utterly insignificant by comparison.
The fact that Frieza has been used as a gauge/benchmark in EVERY arc since, should tell you how powerful he was. 👆