Have a look at SLW. Up from $3.07 (november) to $7.75 as of today.
Kinross up from $9 to $22.25
Goldcorp $18 to $38
Barrick $22 to $42
Agnico Eagle Mines $27 to $57
In normal conditions big roducers move first then juniors follow. In this scenario juniors haven't moved at all or barely.
I suspect, at some point when big producers will get too ahead of themselves in SP, people will start taking profits and look to invest in good quality juniors. This is when I expect a huge explosion in price of juniors will happen. And some of those quality juniors will go from $0.20 or $0.50 to well over $5. And, like you say, Metanor is one of them.
Art27