That would be changing the context rather strongly. We're talking about EcoBoost engines and their excellent LSPI strategy. Even then, compare the EcoBoost's to the BMW B-series TGDI Valvetronic engines. They have a torque shelf that starts at 1250 RPM.
That's what I included in my previous reply. I recommend giving it another read, along with Cobb's Ford Tuning Guide if you don't already have ATR. If there's an emotional fear of you pushing the pedal to the floor based on previous cars, it's simply not a relevant response in the context of this engine. If you want a number, then according to ATR's examples the LSPI risk significantly drops off above 2k RPM, which also correlates to a significant rise in requested torque. Note that the ECU limits your torque request at low RPM. What your foot does and what the ECU deems safe is predetermined.