No, if you want to do that kind of trainee stuff you would just use L1 visas, H3 visas or even the B1 visa if it's a short period. Since H1Bs are on a lottery, and you have to tell people to wait until October anyway, hiring someone in your remote office, having them work on projects and then bringing them over 1 year later on an L1 is pretty close in costs anyway. And you guarantee that the person can come over, vs the 'chance' that H1Bs give you.

Wipro & co are general outsourcing firms themselves that american companies hire. I don't know why they use the h1b vs the L1 visa although.