SO apparently if you add enough instant coffee to make it taste like a "strong" cup of coffee... its gonna contain way more caffiene than you expected. Didn't realize it until my hands wouldn't stop jittering.
It actually tastes pretty good but yeah. Don't be like me. Looks like I'm definitely staying up until midnight.
To a non coffee drinker - yeah pretty much. Stronger, usually more bitter flavor, but depends on the coffee. The instant coffee called for 1 teaspoon per 6 ounces... my mug is a little bigger than 6 ounces so I went with a tablespoon and a half. Not smart.