Thank you so much I will tell her, so you think it is still possible for her to come during christmas?
Buddy, I am not an immigration lawyer. I am just giving you advice, as I want through the greencard system to help a mate set up a business. Its an arduous process at times. Tell your girl to try and gather up as much documentation as she can to prove that she has ties to Poland and her current home. Il fire off an email in the morning to a buddy of mine who is an American based lawyer and see what he advises.
Sign up/register here in the meantime so I can send you a private message. As for when she will get the visa. It might be October, it might be Christmas or it might be longer. There is no point in stressing. If what you told me is all true, then I would be shocked if she wasnt eventually awarded a visa. Once you get the first, abide by it and return home before it runs out - future applications become a whole lot easier.
Its getting the first one is the stressful part.
Its late here in Europe, but in the morning someone who has been in a similar position as yourself may see this thread and give you even more advice.
If she has a sponsor form from your father, then yeah, dShe should definitely tell them that you are her bf and attach photos of you and her in Poland and London with sponsorship form. A copy of your skype call in and call out log to prove that you are chatting regularly and if you booked a two way flight - Us - Pol, Pol-Us for yourself for a date after her trip in America, to visit her. That would probably nail it.
Does she have a fair few benjamins in her bank account? That might be a stumbling block.