Just a note since I work in the industry, the staff member was probably rattling off a canned response to be given to anyone asking about a service in general. Most shops do have trouble finding qualified and knowledgeable staff for all positions, and quite often a service advisor is hired for their people skills, and not their mechanical knowledge. If what you are hearing does not sound quite right, ask to talk to someone with a little more knowledge, advise them of what you were told and your concerns and quite often they will clarify any errors or mis-conceptions from the first conversation. This being said, I have also seen consumers who hear what they want to hear and do not listen or completely understand what the service department (or sales department for that matter) is telling them either.
It is advisable to have a first service done by someone qualified if you are not comfortable doing the work yourself. If the first service includes the bike being gone through completely (like it should), doing any minor break-in adjustments, and on some bikes this does include a valve adjust/inspection, the time you were quoted is not out of line in general.
This being said , if all they do is drop the oil and give it back and charge three hours, yes you are being scammed. All I can say is take it to a reputable dealer, give them a list of any concerns or adjustments you may have and tell them what you expect to be done.
You can do all maintenance yourself, keep all parts receipts so you can prove to warranty said maintenance was done if they question it at a later date. I would also inspect everything on the bike carefully because this is when things will get fixed, replaced under warranty if required, the average consumer may not catch things a qualified mechanic will.
there is no perfect answer except go with your gut feeling about the skills and reputation of the dealership, ask around for opinions and get more than one btw.... like any industry, a few bad apples can make everyone suspect.. and this is usually not the case because most people in this industry are there because they enjoy it, not because it's just a job.