I was in DLM today and there were 3 a320 series AC, all different operators all sitting with flaps 1 out on stand. One even pushed back with this config. Why would they do this? Can't imagine it was ice in 35degrees, only idea we came up with was a flap overspeed check, but 3 different aircraft? And only F1, surely would be full for an inspection. Am I missing something?