As someone who was recently in Ireland for an accelerator, and asked to stay by Enterprise Ireland, here are some of my thoughts: 1. Start-up Incubators - There are more in the US, that are on average, of higher quality. The incubator we went to was good, but still doesn't compare to YCombinator, TechStars or DreamIt in terms of mentorship and networks. 2. Talent - It's harder to find GOOD python and ruby developers…
Can't you find great C++ or Java or C# developers and turn then into ruby/python developers though? My impression of the tech scene in the UK and Ireland is that a lot of highly skilled software engineers are either in the banking, industrial or games sectors. I'd expect CVs in the talent pool to skew towards those languages rather than web languages.