I'd think being the first spread birds see an impossible dream for most of us. More likely, we can only do our best to trip their trigger to check us out, in spite of how explosive their first stop(s) may have been: be that through particularly favorable location, particularly attractive decoys, particularly attractive calling or a combination thereof. Location always was and likely always will be king, but in the days before spinners, the "tricks" to drawing teal to spots they otherwise tended to bypass were relatively large big duck decoy spreads and kacking by voice, which was much louder than the "teal" calls of the time, to help draw attention to them. (My parties' numerically top 16 day September teal season came during that time: 488 mostly blue-wings.) Spinners generally eliminated the need for big spreads to help garner attention - providing that the birds can see them. Which is why bigger, more visible spinners offer more draw from distance. Have heard it argued that the higher speed of dove and teal spinner wings offers special attraction, but certainly haven't seen it when one or the other of either was in use along with a bigger one. And the hard-wired spinners at my permanent morning blind being on a rheostat ('77 Dodge truck dash light dimmer switch) has given me far more than ample opportunity to observe that while birds do, in fact, prefer them at relatively high speeds in good light, they're far more visible and attractive turning about as slowly as they'll kick over in dim post LST light. And while I'm being windy, I'll suggest that the OP add the loudest teal call he can find to his rig and not be afraid to really lean on it. Not only can one draw teal a goodly distance to one without visual attraction, but a call can help keep the birds interested in a rig they'd otherwise look at and pass on for any of a number of reasons.