"but no Romanian University is within the top 500 at the computer science section"

http://news.ubbcluj.ro/noutati/universitatea-babes-bolyai-%E...

As most people who live there, you have an insider's perspective and you tend to overestimate how other places are doing.

Cluj and Bucharest are islands in that country, in terms of economic growth.

The biggest strength of the IT sector in Cluj is its drive and motivation. These things take time but there is no reason to deny that there is potential.

Comparing such a small city like Cluj to London and cities in the US is not very fair.

You can certainly find very talented people in Cluj who could work on startups, however this is clearly not the majority. Like everywhere.