It's a bit more complex than that. Eggs contain specific amino acids that cause almost immediate glucose rises in many people, caused by the liver dumping glucose because it's expecting endogenous insulin to be released. It's not widely discussed in dietary circles, but this type of effect can double or triple the effects of any small amount of carbs.
Now THAT is informative, thank you. I don't eat many eggs but when I do have a couple I have always been puzzled by a rise in glucose. I had never bothered to inject for them thinking they were zero carbs so just shrugged it off to whatever I had eaten earlier that day or whatever. As I don't have them often I never really looked for a pattern but I have just been back over my food diary (yes, I know!) and seen the rise EVERY single time. You really do learn something new every day and it reminds you that the pancreas is such a magnificent thing when it's working properly but how the heck do you mimic it perfectly (as many seem to think you should be able to).