I hope you will continue to post more often and let us know how the bike works out. I think you will find that the disrespectful posts are a small minority here.

Hopefully the bike will be everything you hoped and the shop will help you get it dialed in to fit just right. If not, I wouldn't feel obligated to buy a bike I didn't like. It would seem fair to give them a chance to work something out to your satisfaction.

If there has been no discussion of price or included extras, I see no reason not to try to negotiate a deal. It is pretty common (but not universal) to get bottle cages and water bottles or something of a similar value thrown in to sweeten a deal, especially if paying full MSRP. Many dealers throw in free adjustments and minor service for a year or more. It is also common to be offered a discount on accessories at the time of purchase. It is not out of line to politely ask for some kind of deal-sweetener, but you shouldn't act as though you are entitled.