My understanding is that transferring a reservation is not possible except to (maybe) a family member. Many people have tried to do this and failed. How did your SA describe this process?
While there is no real pattern being adhered to here, (generally) people are waiting 90-100 days from OD for MYLR and a few weeks for MYP.
Location matters (1st month of quarter= not many deliveries/export, 2nd month= lots of east coast deliveries, 3rd month= typically skews closer to west coast mid-month as Tesla tries to complete every delivery they can before end of quarter).
Config matters. Most people believe cars are produced in batches based on paint color/interior color and seating config. If there is a shortage in any of these options/paint, there is usually a delay (there has been reports that white interior, MSM paint, 7 seaters, and tow hitch) have been delayed somewhat due to shortages.