The former Canada international left North America for Scotland to join the Terrors in 1998 and admits he never thought it would be so quick before the likes of Kenny Miller and Barry Robson (both Vancouver Whitecaps) made the move the opposite way across the Atlantic.
But in saying that, De Vos also feels that MLS is a top quality league that Europeans are now seeing as a competitive competition rather than a place to come to retire.
"I'm not surprised Kenny is over here because the MLS is becoming more attractive for players," the 38-year old told SunSports.
"There has been a big turnaround in a short space of time. It's remarkable to see top Scots now coming to Canada. When I was in the national side we always joked we never had a home. We travelled around the world to find a top club.
"Now Canadian players do have a home in the MLS and we are the league attracting top foreign players.
"I know people in Britain will question Kenny's move, but times are changing. The standard of the MLS is improving and the physical nature of the game is a real eye-opener for foreigners.
"It's competitive and travelling can also be a bit of a struggle to begin with. It's not unusual for Whitecaps to have five-hour flights to games.
"But Kenny will do well. He will enjoy it and there's no reason why he can't continue to play for Scotland."