That was very smart of both you, BlueMoods, and quite frankly, the insurance company. I'm impressed.
The basic problems with the posts I read on this thread prior to (not including) yours, are:
1. This insurance company's policy seems to be based on the false assumption (that most people still have today based on BT/FDA propaganda) that the culprit in all the health problems caused by smoking is nicotine. That's why I'm impressed both that you forwarded evidence to the contrary to the insurance company and frankly, even more so, that they accepted it and agreed with you. I've worked in the insurance industry for about 15 years and although I think we (usually) don't deserve quite the bad reputation that the general public tends to put on us (i.e. read your policies before you sign them - if it specifically says flood damage isn't covered, don't blame the insurance company & claim they're corrupt when they deny your claim for flood damage - it's not their fault you didn't purchase that coverage), we're full of financial/mathematical analysts, especially at the top, who aren't well known for their flexibility.
2. What we call in the business "intentional material misrepresentation in an attempt to obtain a benefit (i.e. lower cost) that otherwise would not be due" - which is what trying to manipulate results of lab testing by temporarily modifying your normal behavior essentially is - is a very precisely defined and polite way of saying "committed FRAUD", which is a felony that can be punishable not only by loss of coverage, entitlement of reimbursement for monies paid under false pretense (including potential lawsuit and judgement) but serious penalties/fines and/or even arrest and jail time if one is caught.
I certainly don't disagree that a vapor is unlikely to suffer the health problems common to smokers, especially long term, and shouldn't have to pay the same higher "penalty" premium that smokers do because of it but that doesn't change the points I make. I'd strongly recommend OP try your approach, BlueMoods, which was absolutely the right thing to do (even if the insurance company had disagreed - you were telling the "whole" truth and that's always the best approach). Otherwise, IMHO, the risks of trying to beat the system in this instance are not worth the potential reward. Best of luck to you!