Well of course there are Note customers that love the device because of the S-Pen functionality, but assuming it's the only reason they choose the Note is as flawed as assuming that they only chose it because of the larger display, something I never stated. I think it's fairly safe to assume that there are a fairly significant number of both customers as while anecdotal, we both have first hand experience supporting this claim.
Again, I wasn't dealing in absolutes but I think Samsung stands to lose much more than they can gain. This year's Note offers nothing substantial new--it's a better version of last years Note for certain but nearly everything it offers by way of user experience was available to consumers in last years model. However, if customers wanted a large phone using iOS, there was no option, they either had to compromise by using an iPhone with a much smaller display or something like the Note running a different OS. That likely changes this year and there's a good chance many of those in the latter category will switch from the Note.