What the crap! I applied in November and never got a call back!
Agreed..unless they specifically said "wear a polo" I wouldn't. My last interview i felt underdressed after seeing the previous guy walk out in a suit. You can't go wrong with button up (plain) slacks (no jeans) a tie and dress shoes (polished)I would definitely dress nicer than a polo to an interview. Maybe a white button up long sleeve with a tie?
I was standing there when she was calling you guys. Just an FYI, it's a test only 2 guys in 2 years got hired wearing normal clothes. But don't wear a suit either.