There have been several recent discussions of tapas so thought I'd throw out what I know about Tasca on Comm. Ave. I've been there a couple of times in the past few years, most recently on Sunday, but haven't been to Dali or Tapeo. The friend I was with said he prefered it to Dali. An earlier poster commented on the atmosphere - they must have taken your request because they did have real candles and it got quite dim about 1/2 way through our meal. Service was very nice, the place got full a little after 7 (was midway full at 6:30 when we came in). In addition to tapas, they do a fixed price app/ main/ dessert meal on Sunday for $22.
We had 6 tapas, a dish of olives, a pitcher of good sangria (very citrus-y, not too sweet), 2 desserts, and 1 glass of sherry for $61 before tip. I thought every thing was a reasonable size too - defniatly enough to comfortably share and have multiple tastes.
-shrimp and something in a creamy sauce under a puff pastry. very crispy, light pastry, but not my favorite dish for flavor intensity.
-shrimp, scallops and octopus in a citrus vinagrette. This was one of my favorites for flavor intensity (due to the dressing) though I don't think that they use absolutely the most tasty seafood.
-potato and onion "omelette." solid pie sized slice - nice onion flavor and a good complement to the other tart/ more flavorful dishes. Got it to balance out the olives.
-carpachio (sp?) with something like a bruschetta. Very tender, but never had it before so really can't compare.
-portabella mushroom w shaved monchego cheese and capers. These were sort of like thin mushroom "steaks," large thin slices, maybe grilled or marinated, served cold, very very good
-roasted tomatoes with goat cheese, served warm
The last two dishes I think were the best - good quality ingredients and very distinct flavors. This is probably less than a quarter of the available tapas, so lots more testing is in order.
They have seven choices for sherries by the glass, and a wine list that I didn't look at.
Had bread pudding and flourless chocolate cake w raspberry sauce for dessert. Never had either one before, but I really liked the bread pudding, and chocolate lover though I am, could not finish all the chocolate cake (was pretty full already and very intense chocolate - it needed coffe or a really big glass of milk to go with it).
I would be interested to hear what people who have had the chance to try tapas at Tasca's, Dali, and Tapeo have to say about how Tasca's compares. I haven't ever eaten much Spanish food so can't speak to authenticity, but would be intersted to hear about that as well.