I think my original transfer from Halifax online bank to Mt Gox french bank account was on monday evening / tuesday morning.
The currency showed up as US $ on MtGox in the early hours of this morning, so 3 to 4 working days, plus a couple of days over the weekend.
I imagine it takes longer than normal with my cash first going to their french account as euros, before later landing in the main account as US$.
Hope that helps