I'll quantify it.
Here, Spiderman creates...10? afterimages, against Firelord, herald of Galactus:
Note, he is also leaping around, twisting his body etc. So not just standing still.
Saitama has ~60 after images. But he is standing still - so I will say Spidey is about 1/2 as fast as Saitama there. Actually, let's make it 1/3 as fast.
So Saitama is 3x as fast as Spidey there.
Spiderman is easily a bullet timer:
http://static.comicvine.com/uploads/scale_super/6/61327/1435294-1425643_tasm_637017__1_.jpg
So, as mentioned in that scan, the bullet was travelling at 4000 feet per second.
3 x that, is 12,000 feet per second. Let's round up, and make it 15,000 feet per second. That's about 16,000km/hr.
Here are some magnitudes of speed:
https://en.wikipedia.org/wiki/Orders_of_magnitude_(speed)
So not even escape velocity.