Centaurs
After all you don't say "Speed checked" when the landing gear is selected up or down
What are the occassions when gear is lowered first or raised risking speed excursions? I can think of only one, in EMER DES with damage gear is lowered to increase descent or having lowered raise it after level off. It's strictly an emergency procedure not even once in a life time event. Most pilots continue to retire without having ever done an EMER DES in real life or if you happen to meet one then he perhaps didn't need to lower the gear. So your example is not appropriate. As against this routinely, daily flap is the first thing to be lowered and exceedences do occur. Second why should copilot even check silently isn't Capt more experienced and is supposed to check that speed is appropriate? In the air humans have limitations and they forget so speed checked call is a forced reminder. If everybody did what they are supposed then we won't be discussing it. People have forgotten gear for entire flight, have raised flaps instead of gear, landed without gear, have lowered flaps high speed, have exceeded speed after lowering causing auto retraction. The list is endless. No caution is enough. It's better to be more than less.