It's only roughly about one and a half months ago since the last big press release from Haas F1 team.
Since they aren't racing yet, the lack of news doesn't seem particularly worrying to me.
What we know from the press release:
Construction of the teams equipment, from transporters to the pit apparatus to garage setup, is well underway. Upon completion, all will be housed at Haas F1 Teams Banbury location.
Key personnel have also been added, notably Dave ONeill as team manager, Rob Taylor as chief designer and Ben Agathangelou as chief aerodynamicist.
Agathangelou and Taylor have already designed the 60-percent scale model of the car Haas F1 Team will race in 2016. The duo has logged numerous hours in the wind tunnel it shares with Haas F1 Team technical partner Scuderia Ferrari. By working diligently to develop the scale model now, Haas F1 Team will be ready to go racing in 2016.
Our technical partnership with Ferrari has allowed us to develop our car and our people at an exceptional pace."
-> Scale model of the car is being developed. 3 head-line signings, other personal is getting educated. Equipment is being build. Certainly sounds like progress is being made. Id like to think that they are just getting on with the job at hand, without feeling the need do talk up their future chances of succes.