alanbikehouston said the majority of people on road bikes are riding the wrong size . . .

Have you noticed that some well-known bike manufacturers don't even recommend a suitable bike size for people?! This is amazing . . .

Also, has anyone noticed how the 'expert' size calculations measure and then specify dimensions/sizes in 'mm'?!!! How can a normal person reliably measure a typical top tube length or seat tube height in mm, without using lazer beams and state of the art equipment?!! Measuring dimensions down to a resolution of a cm on a bike, or for a person, will be an 'achievment' alone for ordinary folk. Please take things with a LOT of salt :-)

PLEASE, ride the bike and if there are any discomforts AT ALL, including wrists, back, neck, seating regions, then ABSOLUTELY take the bike BACK even after a few days, to exchange the bike.

Apologies for this long diversion.

Cheers
PS: Phone the manufacturer's marketing regional manager and discuss exchanging the bike if the shop people did not give good advice/service in the first place. Some manufacturers do respond positively in order to keep/maintain their image.