That's pretty unusual in my experience for the US-05 yeast. I've had that happen with Coopers kit yeast before, but my US-05 is usually pretty tame.
Mind you, if anything it's the exact opposite of a "dud batch", it means your wort is well oxygenated and the yeasties are obviously very healthy...
Good work on switching to US-05 so quickly, great choice of yeast. Can you share the exact ingredients of your brew just out of interest?