"
ya'll"! Dude, you must be from around my area of the country. After all...
nut mini er dees folk 'round dees parts nos any kinda vocabulery like at rit thar.
Mes and yous frum de same country eh?
Heh, no seriously, I always appreciate the ya'lls and references to sweet tea when I hear them.
To answer your question, I think class rank is important but less important than other criteria. Some people consider class rank to be subjective from school to school and find it hard to compare candidates this way. If your Step 1 is in the "same ballpark" then your class rank is probably fine unless it is like dead last or something. But take this with a grain of salt because I haven't even started residency yet, only been through the match recently.
EDIT: Oh, and it is technically "y'all" to abbreviate "you all" for all the confused yankees out there.