The irony is that the best Master Lock in terms of picking resistance is a plastic LOTO lock that offers almost no protection against brute force attacks.
Spool pins actually can make picking easier by providing you with more feedback about the pins vs normal pics. (A lockpicking friend explained this to me once)
I have found that serrated pins are pretty easy to defeat by manipulating the torque you apply a little bit. I actually have a slightly harder time with spool pins although they do give you nice feedback about when they are set (and false set).
I think the point is, almost anyone with 5 minutes to watch a video on basic techniques (or who is interested in spending 30 minutes just messing around with no prior knowledge) could probably pick this very expensive lock.
To do what you're describing, some people wouldn't get it, and for those that can do it (most, with some practice), it'll probably take 30 minutes to an hour of practice - or a day or so for the outliers.
It's a huge difference in difficulty between the two for a few cents in parts.
For those who don't know, watch LPLs videos on this brand and you'll see what's level of security they offer (basically none)