It should get better as it breaks in, especially after the first oil change (600 mi/1000 km) and you get that OEM oil out of there. The SACS gearboxes (Bandit 600/650/750/1200, early GSXR, GSX-F Katana 600/750/1100 & GSX1100G) are some of the best, smoothest shifting boxes out there. One thing the magazines usually praise Suzukis for is their smooth gearboxes.
Just so you know, a bit of a clunk going into 1st from neutral is normal, as is a notchier shift between 1-2/2-1 than the rest of the gears... because you're going thru neutral.