When you talk to Kyler about the wedding program, the conversation changes slightly, depending on whether or not you've talked to Kit. If you know Kit, Nancy asks why he's not the best man. If you don't know Kit, Nancy asks when Alan will arrive. It takes three seconds more to talk about Kit.
Another difference? When you make programs, Nancy says something along the lines of "looks like the best man is Alan Payne". If she knows Kit, she adds something along the lines of "That's kinda weird.". It's not a timewaster, because you can skip Nancy's line of dialogue by trying to back away, mid-sentence.
The conversation with Alan does NOT change, whether or not you know Kit.
Overall, it looks like it's faster to ignore Kit in the first main part of the game! It only saves three seconds, but that's better than nothing, I guess.