I disagree because the stardust cost to level isn't high at low CP values.
Would I level a 95% IV, CP100 Charizard over a 90% IV, CP2000, Charizard? No. But if I had a 95% IV, CP500 Charizard vs a 50% IV, CP2000 Charizard, no way would I invest more in the 50% IV charizard. I'd still keep it...