John produced another brilliant display at Firhill to inspire Glasgow to a 17-10 victory over Llanelli on Friday that kept their Heineken Cup qualification dream alive.
But John says he should not be treated as the heir to Simon Taylor who has been ruled out of the South African tour because of knee ligament damage.
Warriors coach Sean Lineen told the Sunday Mail said: "Johnny is a special talent and will go far.
"His recent performances have been marvellous and he has displaced squad captain Jon Petrie from the No.8 slot."
John, however, shrugged off the praise and said: "I'm not reading too much into the back row positional situation at Glasgow.
"They are just trying various combinations for next season.
"I am not even thinking about Scotland. All I'm focusing on is helping Glasgow beat Connacht in the final Celtic League game - then the Under-21 World Cup in France.
"It's my last year in age-group rugby and I aim to go out on a high."
To earn a ticket to the Heineken Cup, Glasgow must win in Galway on Friday and hope the Borders lose to Newport the same night.
John said: "Beating Llanelli was a huge confidence boost and the Reivers' heavy defeat by Ulster gave us an extra sense of purpose.
"Connacht will not be a cakewalk even though they are bottom of the table.
"Our defence has been pretty solid, but we need to work on protecting the ball when we have it."
Sean said: "It was a case of getting the monkey off our backs with any kind of victory, but we made it harder for ourselves than it ought to have been. The most encouraging thing was seeing the depth of team spirit when Llanelli were pressing hard in the dying minutes.
"We are not counting any chickens. All this result has done is keep us in the running for another couple of weeks and put some pressure on the Borders.
"All we can do at this end is make sure we perform against Connacht, but my gut feeling is that the Reivers will beat the Dragons."