The numerals are definitely from The Sans. The "1" in that type family has a bracket on the bottom of it. Myriad Pro doesn't have a bracket at the bottom of a "1" regardless of what number set is selected in the typeface.
Some typefaces will add a bracket to a "1" if the number set is changed from Proportional Lining to Tabular Lining figures. Tabular Lining is best used where columns of numbers are listed. The bracket is added at the bottom of a "1" to eat up negative space between numerals. Proportional Lining usually gets rid of the extra empty space between a "1" and a numeral next to it.