There's no demarcation line here, the distinction between macro-evolution and micro-evolution is artificial, arbitrary or manipulative at best.

if you left out "as creationists claim" I would have been obliged to say yes, because there is a minor difference, simply being the difference in time, but as creationists seem to think or talk about it... no. Macro evolution is just Micro evolution over a longer period of time, that's it. To say Micro-evolution happens, but not Macro is like saying 2 + 2 = 4 + 2 = 4 + 2 = 4 + 2 = 4 + 2 = 4, it makes no sense, if something keeps changing, of course it is going to change into something else completely sooner or later.

As creationists put it, no. Creationists tend to use the word "microevolution" to refer to changes within one species and "macroevolution" to refer to one species changing into another, but this distinction is worthless since macroevolution is simply the result of large amounts of microevolution.