No that's penal servitude/transportation where instead of locking up someone you ship them to the colonies and make them work for the duration of the sentence (which might be life). However penal convicts had some rights and their children were born free, unlike slaves (who were exclusively African).
Slaves= No rights, inheritable, exclusively Africans.
Penal Convicts= Very few rights, not-inheritable, from the British Isles, including Scottish and English as well as Irish.
I wasn't talking much about servitude but regular slavery of Irish people by the Republican Gouvernement, as you can see there: http://www.historyjournal.ie/irish-slavery/55-irish-slavery-main-page/106-the-irish-slave-trade.html, I don't have much information about that though, maybe my sources are wrong, but there's a Flogging Molly song about that!
I'm sorry but that's just wrong. The standard of living in colonial New England was considerably higher than in Old England and people knew it. The high cost of transportation meant there were basically thee ways of getting across the Atlantic, group together via a Church or Sect and hire/buy an entire boat (Puritans/Amish), be rich enough to fund it yourself (Virginia Cavaliers), or sell yourself into into indenture where someone paid for your ticket and you worked for them for a number of years (normally 3-7). The 3rd option was by far and away the most popular method of getting to the 14 Colonies and provided 80% of the white immigrants by some estimates. Most indentured were British especially in the early years due to the preferences of the employers/sponsors. Continental Europeans only started to come over in the 18th century after rising prosperity in Britain reduced the attractiveness of selling yourself into temporary servitude. So unless either the Colonies are much poorer than OTL or Britain much richer you are going to see a similar thing happen. Either way you are not going to get a German speaking America.
You got a point, but I'm still not convinced. New England's economy, e.g., was pretty much dependent on commerce and craftsmanship, as it is unsuitable for agriculture. That kind of economic structure wouldn't (wasn't) very much attractive to indenture servants as the southern plantations, that would surely concentrate most of the people of the British North America.