DarkSaint85
Bonified abstract
It basically means whatever you want it to be, which makes it meaningless as a speed measurement.
Ultimates, the comic that people all go gaga over as an example of Thought> Light, ends with....Monica beating the poop out of that villain.
Even Iron Man, in his Mark 1 armour, has moved at the speed of thought:
Even talks about microseconds etc. If this were Surfer or Hulk or Thor, this scan would be spammed as proof of their superspeed for decades.
Speed of thought can be multiversal or it can be street level. In this scenario, I group all powers that are thought activated (TP/TK/and yes, Invisible Woman's powers) as being at the speed of thought. They think it, it happens.