Yes, I have heard of many, many people who have switched over from both the Latin and Eastern Rite of Catholicism to Orthodoxy, but rarely do I read about the reverse.
My own parish has lots of converts from the Latin rite, including our parish's new chanter. Also, since the local Eastern Rite church has closed its doors, those parishioners are coming to my parish or to the OCA parish in town.
However, let us also be fair and not triumphalistic: the reason there are so many Catholic converts in Orthodox churches is because there are so many Catholics in the general population to begin with.
If you have a bag of 300 marbles and 70 of them are red, then roughly 1 in 4 marbles you draw at random will be red. Similarly, the Convert polulation in Orthodox churches within the United States has a high proportion of ex-Roman Catholics.
