If he did do it to wait for an NMR, that's just despicable. But I think he had a valid case for each of those turns. Until Autumn 1917, he was developing his line, and getting two armies on the front so he could test yours. I think it's far to test any line for one or two turns just to make sure the other side knows what they're doing. That's what he did in Spring 1918, by trying to take Gas. In Autumn 1918, England did something very strange - Gas moved. In that turn, if Turkey had taken Gascony, which would have retreated to Brest, England would have to choose between support holding Burgundy and covering Paris. Choosing wrong carried a probability of losing the line, and a mistake like that justifies another turn. When Turkey lost his grip on Spain, he hit the button (I'm assuming he did, or was it forced by the mods?)
Since T admitted to waiting for an NMR in this case, it was poor form, but just on moves alone, I really don't think you had a case until the final phase.