We were surprised and disappointed to hear that a single TMO rep placed all of the blame onto LG. We have brought this to their attention and we were assured they would quickly correct the response.
LG works very closely with each carrier to bring software updates to our phones. It is very much a joint effort and there are multiple layers of testing involved on both sides to determine whether or not the software will provide the best user experience possible.
Based on extensive testing there are no plans to bring ICS to G2x at this time. However, we can expect future LG devices on TMO to have later versions of Android software