+1
I've never seen a fixed gear rider adjust their velcro straps while "on the go" at a reasonable speed. In fact, the downtime of them awkwardly fumbling down at every revolution to adjust would be probably made up if you adjusted it then jumped on the bike. That being said, I guess it's more reasonable for SS... but I don't really see the need for straps like Hold Fast if you're riding SS.

Regular clips + straps, again, depends on how you thread it. I adjust and fasten mine as I'm riding my FG to work or to school because I change my shoes often (casual shoes, dress shoes, runnerse, converse, tricking shoes) and I don't have any problems.