Technically true micro but SD's are generally more hidden than FD's so the implied odds are often there, calling 1/2 pot bets on the flop with an OESD is often fine especially with position.
I know what you're saying obv, but I think the OP is looking for a rule of thumb to follow and taking your '1/4 pot or fold' out of context could mislead them into some nitty folds.
As for percentages, a clean OESD is 8 outs:
That means you have a 31.5% chance of hitting your straight by the river. Note I said 'clean', because if there's a flush draw on the board as well two of your outs will complete the flush as well as the straight
As kwhilborn said, having overs to the board adds an extra 3 outs per overcard.
Position is god when chasing a draw.
Don't chase the low end of a straight
Don't chase on paired boards
Learn your common outs and common odds and use them all the time