Something like that.
In his last two years, he averaged 32.45, which is actually pretty good for a New Zealand opener in any form of the game, let alone ODI's.
This includes consecutive innings of 66, 76, 90 and 31 in the series against Australia and England, followed up immediately by 73* against Australia in New Zealand. There were also centuries against the West Indies and Canada.
Many people will argue that this is poor. But you have to consider the other openers that have featured over the past ten years and compare him against them, particularly in ODIs, before you see his true talent. All of this while batting outside of his preferred position.
At his preferred position at #3-4 in tests, he managed 13 innings in 8 tests, scoring 616 runs at an average of 47.38 including a double century (224) against Sri Lanka and five further half centuries against England, England, Pakistan and Australia.
Despite the 224 in his most recent test innings, he was immediately dropped when the next test series came about. He was stated recently as "dropped again after a poor series against South Africa" - in reality, he scored 33 runs in this series at #3 - that 33 was his only innings played in his preferred position since that double century in Wellington.
Anyone who thinks that he was not treated poorly and played poorly during his test clearly does not know exactly how his cricket career has played out.#
Overall, his ODI average is 27.11 and his test average is 34.15. Craig Cumming, meanwhile, averages 25.94 in tests and 14.63 in ODIs. God knows how he was considered better than Vincent. Vincent also out-performed How and Fulton in tests, yet oddly was always considered to be an ODI player (where he was admittedly out-performed by How and Fulton, although they did get to play in their preferred positions whereas Vincent often did not).