yeah you will get 2.2.1 earlier if you donate, it's the perks of support, hence, it provides the devs motivation to continue what their doing. Time is money, period. Even the smallest of donations are being honored. Just like the way TBH made their app from the market. They are true to their word. Those who bought the app, see the files before anyone else. it's a perk....incentives, they work well with just about anything.
2.2.1 will be available to the public soon, if your impatient, then donate...then you might not be so impatient