Acceleration and speed are not the same thing:
In the second quarter, growth is forecast to plunge by 30%. Goldman Sachs predicts a 9% drop in the first quarter and an astonishing 34% slump in the second.
GDP growth was, before C, around 2%. So, a 30% drop in growth would mean a fall in growth to perhaps 1.4%. This would be mildly irritating and nothing more.
If GDP us about $20 trillion (roughly right) then a 30% drop in GDP means a fall to $14 trillion. This is slightly confused by the way that the US uses monthly and or quarterly GDP but reports them at an annualised rate. Ho hum.
Still, a shaving of the growth rate by 30% is significantly different from a change in GDP of 30%, yes?
More normally this error runs the other way, people mistaking changes in the rate for changes in the underlying. Still an error though.