A glock trigger is not at all like a cocked DA or SA revolver trigger. It is unique however. Not to belabor the internal safety devices of the Glock, because it has been explained before, and they work.
But what about the actual trigger? Well first, if you look at a Glock, and the trigger is pulled back to the frame, it is completely safe. It can not fire. This is a Glock that is un-chambered and is immediately recognized as such (of course, it could also be a rare dud round loaded that did not fire).
Second, when partially cocked and chambered the Glock has a trigger within the trigger. Just brushing the side of the Glock trigger accidently will not cause it to fire (for instance when holstering it). Try that with a cocked revolver and it will go boom.
Third, the Glock trigger has about 1/2 inch of take up when pulled, which is completing the full cocking of the internal striker. Now at complete takeup we can finally compare a cocked revolver with a Glock trigger. Even then, the stock Glock trigger offers more resistance than the average SA or cocked DA revolver.
I am sitting here right now dry firing a G19 and a cocked DA SP101 for comparison. Two different worlds as far as the trigger is concerned.
Comparing Glocks with revolvers is as common as comparing apples and oranges.
A more viable comparison would be a tuned trigger on a DAO revolver with a Kahr semi-automatic. That was the intent of the manufacturer (Kahr) to produce a semi-automatic that had a trigger pull as stated.