It really does not come down to where you are from. It is more a matter of your skills, abilities, qualifications, experience and above all in marketing & sales your spoken communication skills.
I differentiate between non UK educated & UK educated. Simply because even if your country of origin is English speaking the differences in language usage can be quite marked. UK to USA - two countries split by a common language
What lets many non UK educated people down is their English language skills. I manage a number of non UK educated nationals from across the world, my biggest issue is the use of language. I am in a service industry so getting the right tone and perception across is important. The number of complaints I get from telephone conversations with the non UK educated staff is far far higher than UK educated. I think "missing the point" is the most often quoted complaint, which normally is a straight forward reference to not picking up on the real issues from telephone conversations. The ability to seperate out the actual issue from all the other points put over seems more difficult to grasp. I also find certain cultural traits come through, talking over others while they are speaking is one of the things that is a BIG issue. The UK is one place in the world where this is a big no no, try telling that to Italian or Spanish staff!
What do others think?