That is a common dealer approach

Same with mine - HH in Melbourne; it goes in next week for the first service. When I picked it up new, they told me they'd leave it running a little rich until the 1600 km service. Mind you, I paid for the dyno with the parts at delivery; so I guess the logic is to tune it after the break in period. Running V&H BSS, SE air filter and SERT all from new.