very, very slightly.
not enough to measure by any method available to science at this time.
it is, like the chemistry error you corrected for me, a matter of convenient shorthand: the Earth's mass (and, thus, gravity, is so disproportionately huge that the difference between the gravitic acceleration of a 1kg mass vs. a 5kg mass is so small it cannot be measured directly.
Actually, it depends on the order. If you drop them at the same time, true. If you pick up the 10# and drop it and then pick up the 2# and drop it, they will fall in the same time.