they were waiting to see the reaction of the album, numbers etc. dont want too big venues as they dont want empty gigs again like the last tour!!
to be fair it was only the last few of extra dates (towards the end of 2011) they added on that werent sold out.
I saw them 4 times,
Manchester Apollo both times in the March which was part of the initial 6 date mini tour both dates - sold out Wolverhampton Civic Hall in the April, which was part of the main tour - sold out Birmingham Academy in the October/November - only one that wasnt sold out.
edit*** sorry just realised you may have been talking non UK dates I'm not really sure on how those were attended