This is no guarantee. If Vert, says, attain Litecoin #2 status and goes to, say, 100-200-500mn market cap, an ASIC manufacturer could create 100 VTC asics and never announce them as such but simply use them to gain an enormous share from the mining (that more than pays out his own development cost). He'd simply spread his hashpower around to various pools so that his hashpower doesn't seem very concentrated, and then rape the network while everyone is thinking that its just GPU-farms hashrate since "there are no ASICs".
What then? If there are no announced asics how can the devs take the initiative to proceed to a hardfork? Based on what? The mere suspicion that there are ASIC miners out there in the wild?
But in any case it is better than to sit and wait for the ASICs, the more that VTC could at any time change the POW function and ASICs remain out of work. In addition there are already services that allow to collect statistics on production of new blocks in the VTC network. And developers of VTC look on her.
P.S. What are you doing here? Bought ASIC for scrypt ? Go to accelerate the difficult of scrypt forks :-). I made select - VTC is my favorite cryptocurrency. RIP LTC for me. Cryptocurrency must be improved against new threats. How to constantly improving methods security of banknote and banking systems. If this doesn't happen - cryptocurrency dies.