Gurgaon pre-launch deals: Real discount or builder's marketing?

Visited JMS Group's project in Sector 40 last weekend. Honestly, pre-launch offers ache lagte hain but is it really a discount? As someone jo industry mein hai, I've seen how builders inflate initial prices just to show a "discount" later. I'm looking at a 3BHK, maybe around ₹2 Cr, but the 'early bird' isn't looking that great. Kya lagta hai, pre-launch deals Gurgaon mein worth it hain for actual investors? Ya waiting for open-market price better hai? Especially with Dwarka Expressway completion, I'm eyeing ROI. Also, construction-linked payment plans vs down payment – which one gives better leverage for an investor? Any hidden clauses in CLPs I should watch out for?